Sabtu, 08 Februari 2014

FAL

FN FAL assault rifle (Belgium)

Belgian FAL prototype (ca.1950) chambered for British .280 (7x43mm) intermediate cartridge
Belgian FAL prototype (ca.1950) chambered for British .280 (7x43mm) intermediate cartridge

Austrian Steyr Stg.58 - license built FN FAL
Austrian Steyr Stg.58 - license built FN FAL

British L1A1 SLR - license built
British L1A1 SLR - license built "inch pattern" FN FAL with SUIT optical sight

Brazilian IMBEL LAR - another license built FN FAL, one of few FAL models still in production now
Brazilian IMBEL LAR - another license built FN FAL, one of few FAL models still in production now

Canadian C2 Squad Automatic Weapon - a heavy barreled version of FAL, intended as Light Machine Gun
Canadian C2 Squad Automatic Weapon - a heavy barreled version of FAL, intended asLight Machine Gun

FN FAL
FN FAL "Paratrooper" model (also known as FAL 50.63) with shortened barrel and folding butt

DSA-58OSW - a select-fire
DSA-58OSW - a select-fire "sawed off" FAL clone made by DS Arms (USA) for police use



Caliber : 7,62mm NATO (7.62x51)
Action: Gas operated, tilting breechblock, select-fire or semi-auto only
Length: 1100 mm (990 / 736 mm for "Para" model)
Barrel length: 533 mm (431 mm for "Para" model)
Weight: 4.45 kg empty (3.77 kg empty for "Para" models)
Magazine capacity: 20 rounds (30 rounds for heavy barreled SAW versions)
Rate of fire650-700 rounds per minute

The FN FAL (Fusil Automatique Leger - Light Automatic Rifle) is one of the most famous and widespread military rifle designs of the XX century. Developed by the Belgian Fabrique Nationale company, it was used by some 70 or even more countries, and was manufactured in at least 10 countries. At the present time the service days of the most FAL rifles are gone, but it is still used in some parts of the world. The history of the FAL began circa 1946, when FN began to develop a new assault rifle, chambered for German 7.92x33mm Kurz intermediate cartridge. The design team was lead by Dieudonne Saive, who at the same time worked at the battle rifle, chambered for "old time" full-power rifle cartridges, which latter became the SAFN-49. It is not thus surprising that both rifles are mechanically quite similar. In the late 1940s Belgians joined the Britain and selected a British .280 (7x43mm) intermediate cartridge for further development. In 1950 both Belgian FAL prototype and British EM-2 bullpup assault rifles were tested by US Army. The FAL prototype greatly impressed the Americans, but the idea of the intermediate cartridge was at that moment incomprehensible for them, and USA insisted on adoption of their full-power T65 cartridge as a NATO standard in 1953-1954. Preparing for this adoption, FN redesigned their rifle for the newest T65 / 7.62x51mm NATO ammunition, and first 7.62mm FALs were ready in 1953. Belgium was not the the first country to adopt their own rifle in 1956. Probably the first one was a Canada, adopting their slightly modified version of FAL as C1 in 1955. Canadians set to produce C1 and heavy barreled C2 squad automatic rifles at their own Canadian Arsenal factory. Britain followed the suit and adopted the FAL in 1957 as an L1A1 SLR (Self-loading rifle), often issued with 4X SUIT optical scopes. Britain also produced their own rifles at the RSAF Enfield and BSA factories. Austria adopted the FAL in 1958 as a Stg.58 and manufactured their rifles at Steyr arms factory. Various versions of FAL were also adopted by the Brazil, Turkey, Australia, Israel, South Africa, West Germany and many other countries. The success of the FAL could be even greater if Belgians would sell the license to W.Germany, which really liked to produce the FAL as a G1 rifle, but Belgians rejected the request. Germany purchased the license for Spanish CETME rifle and as a result of this H&K G3 rifle became probably the most notable rival to FAL.

During the time, FAL was built in numerous versions, with different furniture, sights, barrel lengths etc. There are, however, four basic configurations of FAL rifle: FAL 50.00, or simply FAL, with fixed buttstock and standard barrel; FAL 50.63 or FAL "Para", with folding skeleton butt and short barrel; FAL 50.64 with folding skeleton butt of "Para" model and standard length barrel; and the FAL 50.41, also known as FAL Hbar or FALO - a heavy barreled model which was intended primary as a light support weapon. There are also two major patterns of FALs around the globe: "metric" and "inch" FALs. As the names implied, these were built in countries with metric or imperial (inch) measure systems. These patterns are slightly different in some dimensions, and magazines of metric and inch pattern sometimes could not be interchanged. Most "inch" pattern FALs were made in British Commonwealth countries (UK, Canada, Australia) and have had folding cocking handles and were mostly limited to semi-automatic fire only (except for Hbar versions like C2). Most "metric" pattern rifles had non-folding cocking handles and may or may not have select-fire capability, but as with other light select-fire weapons chambered for 7.62x51mm NATO round, the controllability of the full auto fire is disappointing and shots spread in burst is extremely wide. But, regardless of this, the FAL is one of the best so known "battle rifles", reliable, comfortable and accurate. It is somewhat sensitive to fine sand and dust but otherwise is a great weapon.

The only countries still producing the FAL rifles until the present time are the Brazil and, most surprisingly, the USA. Brazil adopted the FAL under the name LAR and manufactured it at the IMBEL facilities. The USA produced a small amount of FALs as the T-48 at H&R factory in early 1950s for Army trials, but at the present time a number of private US Companies is manufacturing various versions of FAL rifles using either surplus parts kits or newly manufactured parts. Most of these rifles are limited to semi-auto only and are available for civilian users. Probably most notable US manufacturer of FAL modifications is the DS Arms company, which produced its rifles under the name of DSA-58.

The FN FAL is a gas operated, selective fire or semi-automatic only, magazine fed rifle. It uses short piston stroke gas system with gas piston located above the barrel and having its own return spring. After the shot is fired, the gas piston makes a quick tap to the bolt carrier and then returns back, and the rest of the reloading cycle is commenced by the inertia of bolt group. The gas system is fitted with gas regulator so it could be easily adjusted for various environment conditions, or cut off completely so rifle grenades could be safely launched from the barrel. The locking system uses bolt carrier with separate bolt that locks the barrel by tipping its rear part into the recess in the receiver floor. The receivers initially were machined from the forged steel blocks, and in 1973 FN began to manufacture investment cast receivers to decrease production costs. Many manufactures, however, stuck to the machined receivers. The trigger housing with pistol grip is hinged to the receiver behind the magazine well and could be swung down to open action for maintenance and disassembly. The recoil spring is housed in the butt of the rifle in fixed butt configurations or in the receiver cover in folding butt configurations, so the folding butt versions require a slightly different bolt carrier, receiver cover and a recoils spring. The cocking handle is located at the left side of the receiver and does not move when gun is fired. It could be folding or non-folding, depending on the country of origin. The safety - fire selector switch is located at the trigger housing, above the triggerguard. It can have two (on semi-automatic) or three (on select-fire rifles) positions. The firing mechanism is hammer fired and use single sear for both semi-automatic or full automatic fire. Barrel is equipped with long flash hider which also serves as a rifle grenade launcher. Design of flash hider may differs slightly from country to country. The furniture of the FAL also can differ - it could be made from wood, plastic of various colors or metal (folding buttstocks, metallic handguards on some models). Some models, such as Austrian Stg.58 or Brazilian LAR were fitted with light bipods as a standard. Almost all heavy barrel versions also were fitted with bipods of various design. Sights usually are of hooded post front and adjustable diopter rear types, but can differ in details and markings. Almost all FAL rifles are equipped with sling swivels and most of rifles are fitted with bayonet lugs.http://world.guns.ru/assault/be/fn-fal-e.html

Tar 21

Tavor TAR-21 assault rifle (Israel)

Tavor TAR-21 assault rifle (standard version)
Tavor TAR-21 assault rifle(standard version)
Image: IWI Ltd.

Tavor TAR-21 assault rifle (standard version), fitted with 40mm M203 grenade launcher and grenade launching sight
 Tavor TAR-21 assault rifle (standard version), fitted with 40mm M203 grenade launcher and grenade launching sight
Image: IWI Ltd.

 Tavor CTAR 21 assault rifle (compact version)
 Tavor CTAR 21 assault rifle (compact version)
Image: IWI Ltd.

Tavor MTAR 21 assaultrifle (micro version)
Tavor MTAR 21 assaultrifle (micro version)
Image: IWI Ltd.

Tavor STAR 21 (designated marksman) rifle
 Tavor STAR 21 (designated marksman) rifle
Image: IWI Ltd.

Civilian (semi-automatic only) version of the Tavor. Note the different shape of the butt, handguard and the trigger guard, basically similar to that of the Micro-Tavor (civilian versions with oversized trigger guard also manufactured).
 Civilian (semi-automatic only) version of the Tavor. Note the different shape of the butt, handguard and the trigger guard, basically similar to that of the Micro-Tavor (civilian versions with oversized trigger guard also manufactured).
Image: IWI Ltd.

Tavor TAR-21 partially disassembled
Tavor TAR-21 partially disassembled
Image: Dean Roxby (Canada)

 TAR 21TAR C21 / CTAR 21TAR M21 / MTAR 21
Caliber:5,56x45 NATO
ActionGas operated,rotating bolt
Overalllength720mm640 mm590 mm
Barrellength460mm380 mm330 mm
Weight3,27 kg empty3,18 kg empty2,95 kg empty
Magazinecapacity30 rounds
Rateof fire750- 900 rounds per minute750- 900 rounds per minute750- 900 rounds per minute

The development of the new assault rifle, that should eventually replace in service the ageing M16A1CAR-15 and IMI Galil assault rifles, began in Israel in the 1991. The new riflewas developed by the Israel Military Industries (IMI, now privatized as IWI - Israeli Weapons Industries Ltd) company, in close cooperation with the Israeli Defense Forces (IDF). This new rifle received the name of "Tavor" and the designation of TAR-21 (Tavor Assault Rifle, for 21st century). The new rifle first appeared on public in the1998,and it had been tested by the IDF during 1999-2002. Initial issue of Tavor rifles to IDF showed some teething problems, but by now the Tavoris already in widespread use by IDF, and it seems that many earlier problems are worked out. It is also in limited use with Special Operation forces of India and Georgia. 
In general,the TAR-21 represents the mainstream of the present assault rifle developments. It shares all the "modern"features, already tried and proved successful by previous designs, like the bullpup layout, polymer housing, optical sights as a prime sightinge quipment,modular design with several different configurations (from very short submachine gun and up to standard assault rifle and a para-sniper accurized rifle with heavy barrel). So far it seen not much real action, and it is hard to judge if it is really a success, and only time will show that. 
The IWI also developed and manufactures a civilian, semi-automatic only version of the Tavor rifle, which looks much like the Tavor Micro rifle but with longer barrel. This version has already been exported to several European countries and Canada.
The Tavor TAR-21 is a gas operated, selective fire, magazine fed assault rifle of bullpup configuration. It is available in several configurations,which differ in the barrel lengths and accessories. The basic configurationis the TAR-21 assault rifle with the 460mm (18.1 in) barrel. Next are the compact assault rifle, called CTAR-21, with the barrel 380 mm (15 in) long, and themicro assault rifle, with the barrel of only 330 mm (13 in) long,called MTAR-21. The latter rifle also featured a redesigned front part of the housing, with charging handle placed further back on receiver,for a more comfortable hold of the short weapon. Micro-Tavor also can be converted to 9mm pistol ammunition (9x19) with installation of the caliber conversion kit, which includes a new barrel, bolt group and a magazine adapter. 
 TAR-21 utilizes a now-common long piston stroke, rotating bolt action, with the gas piston rigidly attached to the bolt carrier. Gas cylinder is located above the barrel and is completely enclosed by the gun housing. The rotating bolt is similar to one found in the M16 rifle and has seven lugs. The ejection ports are made on both sides of the weapon, and the right or the left side ejection can be selected by installing the bolt with the ejector mounted on the right or on the left,respectively(and, of cause, this change requires the gun to be partially disassembled). The bolt carrier rides on the single guide rod, with the return spring unit located above it, behind and inside the hollow gas piston rod. The charging handle is located at the front left side of the gun and does not reciprocate when gun is fired. The charging handle slots are cut on the both sides of the gun housing,so it can be installed on either side of the weapon, as required. The trigger unit is more or less conventional, with the ambidextrous fire mode selector /safety switch located above the pistol grip. 
 The TAR-21 has no separate receiver. Instead, all parts are mounted within the high impact-resistant plastic housing, reinforced with steel inserts where appropriate. The access toall the internal parts is controlled by the hinged buttplate, which can be swungdown for internal inspection and disassembly.
 Early production TAR-21rifles had no open sights, but this has been fixed with introduction ofthe folded front and rear sights on current production models. Tavor rifles are fitted with the standard Picatinny-type accessory rail on the top of thegun. Early guns had Israeli-made ITLMARS as standard sight, which is a complicated and expensive reflex-type sight with the built-in laser pointer. For the night time operations the MARScould be complemented with the ITL Mini N/SEAS compact night vision device. Current manufacture Tavor rifles (except for Sniper version)are usually fitted with less expensive Meprolight red-dot sight. Snipervarsions usually are fitted with Trijicon ACOG optical sight with 4X magnification.
 The TAR-21 utilizes the STANAG-compliant, M16 type magazines, with standard capacity of 30 rounds.
  TAR-21 in its basic configuration can be fitted with 40mm M203 underbarrel grenade launcher.

Famas

GIAT FAMAS assault rifle (France)

FAMAS F1 (original version). Note original straight FAMAS magazine that holds 25 rounds
FAMAS F1 (original version). Note original straight FAMAS magazine that holds 25 rounds

FAMAS rifle stripped into major components
FAMAS rifle stripped into major components

FAMAS G2 (latest version, with 30 rounds STANAG magazine)
FAMAS G2 (latest version, with 30 rounds STANAG magazine)

Modifications of the FAMAS G2, now available from GIAT Industries
Modifications of the FAMAS G2, now available from GIAT Industries

The FAMAS assault rifles are built using the bullpup layout, with the magazine housing behind the pistol grip and trigger. The gun is built around the compact receiver, which is enclosed in the plastic housing.
FAMAS-FELIN system prototype (2001). Modified FAMAS G2 rifle fitted with electronic day/night optical sight, laser rangefinder and an interface to the other soldier equipment, such as helmet-mounted display (HMD).

Technical data
                                          FAMAS F1 / FAMAS G2
Caliber - 5.56mm NATO (.223rem)
Action - Delayed blowback
Overall length - 757 mm
Barrel length - 488 mm
Weight - 3.61 kg with empty magazine / 3.8 kg with empty magazine
Magazine capacity - 25 rounds (proprietary) / 30 rounds (STANAG)
Muzzle velocity - 960 m/s / 925 m/s
Rate of fire - 900-1000 rounds per minute / 1000-1100 rounds per minute
Effective range - 300 meters / 450 meters

FAMAS stands for Fusil d'Assaut de la Manufacture d'Armes de St-Etienne (Assault Rifle by St-Etienne Arms Factory - a member of the French govt. owned GIAT Industries concern). Development of this rifle began in 1967, under the leadership of the Paul Tellie, a French arms designer. This new rifle was intended to replace in service the MAS Mle.49/56 semi-automatic rifles, MAT-49 submachine guns and some MAC Mle.1929 light machine guns. First FAMAS prototype had been built in 1971. French military began to test this rifle in 1972-73, but, in the meantime, France adopted a Swiss-designed SIG SG-540 5.56mm assault rifle as an intermediate solution. FAMAS rifle was adopted by the French in 1978 and since then became a standard French Army shoulder fired small arm, known among the French soldiers as "Le Clairon" (the bulge). According to the Janes Infantry Weapons 2000, the total number of FAMAS F1 rifles built is estimated at 400 000, and the production of the F1 variant is now completed. It is still used by the French army, and was exported in small numbers to some countries like the Senegal or United Arab Emirates. Since then, the GIAT Industries developed an improved version of the F1, known as the G1. This rifle featured an enlarged trigger guard, that covered a whole hand, and a slightly improved plastic handguards. G1 was an intermediate design, and was consequently replaced by the latest production model, the FAMAS G2, which appeared circa 1994. This rifle has the G1-style enlarged trigger guard but can accept only STANAG type (M16-compatible) magazines. It was adopted and purchased by the French Navy in the 1995, with the French Army soon following the suit, and also offered for export. At the present time the slightly upgraded FAMAS G2 rifle is used as a platform for the future FELIN system (a French counterpart to the US "Land Warrior" programme), which incorporates a various electronic sights and sensors, connected to the soldier carried equipment, like the helmet mounted displays, ballistic and tactical computers etc. GIAT also now offers some variations of the basic FAMAS G2 rifle, such as "Submachine gun" with shortened receiver and barrel of 320 mm long, "Commando" with the standard receiver and the 405 mm barrel, and the "Sniper", with longer and heavier 620 mm barrel and an integral scope mount instead of the carrying handle.

The FAMAS rifles seen some action during the operation "Desert Storm" in Kuwait in 1991, as well as in some peace-keeping operations in the mid and late 1990s, and proved itself as a reliable and trustworthy weapons.

Technical description
The FAMAS assault rifles are built using the bullpup layout, with the magazine housing behind the pistol grip and trigger. The gun is built around the compact receiver, which is enclosed in the plastic housing. FAMAS is one of the relatively rare systems that uses a lever delayed blowback action, borrowed from the French AAT-52 machine gun, but originally invented by the Hungarian designer Paul de Kiraly prior to the Second World War, and improved by the Paul Tellie for the FAMAS rifle. This system consists of the two-part bolt (breech block) with the delay lever interposed between the light forward part (the bolt itself), which has a bolt face and the provisions for extractor mountings, and the heavier rear part (the bolt carrier). The lever is pivotally mounted on the front part of the breech block (bolt), with its lower legs resting against the cross pin in the receiver and the upper legs resting against the face on the bolt carrier (assuming that the bolt group is in its forward position). Gun is fired from the closed bolt. When cartridge is ignited and fired, the gas pressure against the cartridge base pushes the cartridge case back in the fluted chamber, against the bolt face. The bolt begin to move back under the pressure, but at initial stages of the movement, when the pressure is still high, the delay lever transforms the short movement of the bolt into the longer movement of the heavier bolt carrier, thus delaying the opening of the bolt. As soon as the pressure in the chamber is dropped down to reasonable level, the lever is completely withdrawn from the contact with the cross pin, and from this moment on both bolt and its carrier begin to move back with the same speed, compressing the return spring and extracting and ejecting the spent case. The bolt face has extractor mounting points on both sides, so user can mount the extractor claw on the left or the right side of the bolt, which will result in the left-side or right-side extraction of the spent cartridge cases through the ejection ports on both sides of the gun. One of the ejection ports, which is not used at the moment, is always covered with detachable cheek piece, which can be installed on either side of the gun, as required. This allows to solve the problem of the left-hand use, which is essential for most bullpup rifles. The charging handle is located above the receiver, under the carrying handle, is shaped like trigger and completely ambidextrous. The charging handle does not reciprocate when gun is fired.

The firing mechanism unit is contained in the detachable plastic housing just behind the magazine port. The unit is linked to the trigger by the long trigger rod, and the safety / fire selector is located within the triggerguard, just ahead of the trigger. The selector has 3 positions for safe, single shots, and automatic fire. Additional three-rounds bursts module is built into the firing mechanism housing, with the additional selector under the housing, behind the magazine, that allows for the unlimited full automatic fire or 3 rounds burst modes to be selected (when the main selector is in the full auto mode).

The sighting system of the FAMAS consists of the blade front and the diopter rear sight, adjustable for range and with two flip-up apertures, for good visibility and low light conditions. Both sights are mounted on the pillars, that are in turn mounted on the receiver, and concealed by the large plastic carrying handle. The carrying handle has the provisions for mounting a Weaver or Picatinny-style sight bases. A special receivers also available with the integral sights base instead of the carrying handle.

The standard FAMAS barrel is 488 mm long and has a NATO-standard 22mm diameter flash hider, which also is used to launch rifle grenades from the muzzle. Current FAMAS barrels are rifled with 1:9 twist (1 turn in 228 mm, right hand), so both older M193 and newer 5.56mm NATO / SS109 / M855 ammunition can be fired with good results. Another interesting fact about FAMAS barrels is that it has only 3 groves (while most other rifles have 4 to 6 grooves). The "Commando" variant has the shorter barrel which cannot be used to launch grenades. Both standard and the Commando versions can be fitted with the 40mm M203 underbarrel grenade launcher, if required. Every FAMAS rifle (except for the shortest "Submachine gun" version) can be fitted with folding, non-adjustable lightweight bipods that can be folded along the gun body when not in use. On most rifles these bipods are fitted as a standard. Every FAMAS rifle is equipped with the carrying sling and with detachable bayonet.

Minggu, 10 November 2013

RPD

7.62mm RPD Light Machine Gun
Viet Cong Soldier operating the RPD machine gun
NVA soldier operating the RPD light machine gun
The RPD was developed for the Russian military in 1944 for use as a squad automatic weapon (SAW), and entered service during the 1950s. It can be fired from a prone position with the built-in bipod, or from the hip with the aid of a sling. It is fed by refillable non-disintegrating links. The RPDM is a product-improved and modernized version which was introduced in the mid 1950s. In China, the RPD was manufactured with minor internal modifications and was named Type 56 LMG and was even exported to Sri Lanka.

The Type 56 LMG saw widespread use in the hands of VPA and NLF forces in the Vietnam war. The RPD was replaced by Soviet Army in the late 1960s by the RPK, much to many infantry soldiers dismay, though was still used in the reserves for some years. Today the RPD is still widely used by many guerrilla organizations around the world, notably the Tamil Tigers.
Type: Light Machine Gun
Place of Origin: Soviet Union
In Service: 1945-present
Used By: USSR, Member of the Warsaw Pact, Vietnam
Wars: Vietnam War, Afghanistan, various Middle East conflicts
Designed: 1944
Produced: 1944-1960s
Weight: 7.5 kg (16.5 lb) empty 8.9 kg (19.6 lb) w/ 100-rd drum
Length: 1,037 mm
Barrel length: 521 mm
Cartridge: 7.62x39 mm M43
Calibre: 7.62 mm
Action: Gas-operated
Rate of Fire: 650 round/min
Muzzle Velocity: 735 m/s
Feed System: 100-round drum

Senin, 04 November 2013

Anzio 20MM




http://www.anzioironworks.com/20MM-TAKE-DOWN-RIFLE.htm





20MM Take-Down Rifle
 
Training ammo $10 each <s>Tracer ammo $15 each</s> SOLD OUT + shipping (minimum order required), Call for AP pricing - only limited quantities remaining!

Includes:

Fitted pelican case
50" high gain 20mm barrel
1919 pintle mount or bipod mount
Duracoat finish
Options Now Available:

Custom Match grade barrels with 1 MOA capability up to 49" long
Custom weighted rifles from 39 pounds to 100+ pounds
Call for details.

AKS - 74U








By Soviet TTT (тактико-технические требования) order number 008407 from 19.17.1973 a design competition (codenamed "Modern" - Модерн) was started for the adoption of a fully automatic carbine, no doubt inspired by observing the US experience in Vietnam with theXM177. The Soviet planners also drew from the unsolicited design AO-46 built in 1969 by Peter Andreevich Tkachev, which weighed only 1.9 kg. The TTT specifications required a weight no greater than 2.2 kg, a length of 75/45 cm with the stock unfolded/folded, and a muzzle velocity of at least 700 m/s. The competition was joined by designs of M.T. Kalashnikov (PP1), I.Y. Stechkin (TKB-0116), S.G. Simonov (AG-043), A.S. Konstantinov (AEK-958), and E.F. Dragunov (who called his model "MA"). Kalashnikov also presented an additional design (A1-75) which differed from PP1 by having a modified muzzle for flash and noise suppression. By 1977 the GRAUdecided to adopt Kalashnikov's model, which was largely a shortened AKS-74, because it was no worse than the competition in terms of performance and promised significant production cost savings by utilizing existing equipment for the AK-74 line. A final round of large scale testing with Kalashinkov's model was performed by airborne divisions in the Transcaucasian Military District in March 1977. The AKS-74U ("U" — RussianукороченныйUkorochenniy, or "shortened") was officially adopted in 1979, and given the official, but seldom used GRAU designation 6P26.
In terms of tactical deployment, the AKS-74U bridges the gap between a submachine gun and an assault rifle. It was intended for use mainly with special forces, airborne infantry, rear-echelon support units and armored vehicle crews. It is still used in these roles, but has been augmented by various submachine guns, and the AK-105. It is also commonly used by law enforcement; for example, each urban police foot patrol is issued at least one.
The rifle's compact dimensions, compared to the AKS-74, were achieved by using a short 210 mm (8.3 in) barrel (this forced designers to simultaneously reduce the gas piston operating rod to an appropriate length). In order to effectively stabilize projectiles, the barrel’s twist rate was increased from 200 mm (1:8 in) to 160 mm (1:6.3 in) to adapt the AKS-74U for muzzle velocities of 720 m/s (2,362 ft/s) and higher. A new gas block was installed at the muzzle end of the barrel with a new conical flash hider combined with a cylindrical muzzle booster, which features an internal expansion chamber that increases the weapon's reliability. The booster supplies an increased amount of residual gas from the barrel for the gas system. The chrome-lined muzzle booster also burns any remaining propellant thus reducing the gun's signature. The muzzle device locks into the gas block with a spring-loaded detent and features two notches cut into the flash hider cone, used for disassembly using the supplied cleaning rod. The forward sling loop was relocated to the left side of the carbine and the front sight was integrated into the gas block.
The AKS-74U also has a different sighting system with a U-shaped flip sight instead of the standard sliding notch rear sight. This sight has two settings: "P" (calibrated for firing at 350 m) and "4–5" (used for firing at distances between 400–500 m). The rear sight is housed in a semi-shrouded protective enclosure that is riveted to the receiver's top cover. This top cover is integral with the gas tube cover and hinged from the barrel trunnion, pivoting forward when opened. Both the gas tube and handguard are also of a new type and are shorter than the analogous parts in the AKS-74.
The AKS-74U is significantly more maneuverable in tight quarters than the AKS-74; however, the significant decline in muzzle velocity from 900 m/s (2,953 ft/s) to 735 m/s (2,411 ft/s) resulted in a decrease in effective range (the effective hitting distance for a "running"-type silhouette target was reduced from 625 m (684 yd) to 350 m (383 yd). The carbine cannot mount a bayonet or standard under-barrel grenade launcher. However, a suppressed 30 mm BS-1 grenade launcher was developed specifically for that platform that fires a high-explosive dual purpose (HEDP) grenade. The grenades for the BS-1 are launched by special blank cartridges that are inserted into the grenade launcher via a detachable magazine. The majority of AKS-74U carbines were manufactured at the Tula Arms Factory rather than Izhmash. The AKS-74U was also used as the basis for several other unique weapons, including the bullpup OTs-14 Groza specialist carbine, and the Gepard series of multi-caliber submachine guns (none of which evolved past prototype stage).
In the United States, the AKS-74U is called a "Krinkov". The origin of this term is uncertain. A hypothesis was circulating that the name came from the mujahadeen who supposedly had captured a high-ranking Soviet officer armed with an AKS-74U, and that they had named it after him. However, investigation by Patrick Sweeney could not confirm this hypothesis, for no Soviet officer with a resembling name was captured in Afghanistan. US journalist C. J. Chivers reported that the gun was nicknamed "the Osama" in Jihadist circles, after Osama bin Laden was photographed next to an AKS-74U.

Kriss Super Vector


The KRISS Vector is an innovative weapons platform based on a unique design that is unconventional compared to weapons of the twenty-first century. Utilizing the patented KRISS Super V (KSV) System, the KRISS Vector effectively reduces felt recoil and muzzle climb. It has been said to be the first major breakthrough in firearms operating system technology since the Maxim machine gun in 1884