Archives for: April 2015

Stoner 63

Stoner 63

Stoner 63 

Stoner 63A rifle (XM22) Stoner 63A carbine (XM23)
Caliber 5.56x45mm M193
Action gas operated, rotating bolt
Overall length 1022 mm 911 mm (679mm w. folded butt)
Barrel length 508 mm 400 mm
Weight, empty 3.72 kg 3.67 kg
Rate of fire 750 – 900 rounds per minute 740 – 800 rounds per minute
Magazine capacity 30 rounds

Eugene Stoner, one of designers of M16 rifle, left ArmaLite in about 1961 and joined the Cadillac GageCorp. There he began development of an entirely new weapon system. It was probably the first truly modular system,that consisted of about fifteen subassemblies which could be assembled in any configuration, from an assault rifle and short carbine up to a lightweight or even a general purpose machine gun.First prototypes, chambered for 7.62x51mm NATO ammunition, appeared in 1962,known as Stoner 62. Just a year later Stoner turned out a new system, chamberedfor 5.56×45 M193 US service round, and known as Stoner 63. This system, developed and promoted until the early 1970s, was extensively tested by the US military as the XM22 (Stoner 63A rifle), XM23 (Stoner 63A carbine), and the XM207 (light machine gun with belt feed). The only military application of the Stoner 63 system, however, was the Mk.23 model 0 belt-fed light machine gun configuration, used in limited numbers by US Navy Special Forces and Marine Corps in Vietnam. In general the Stoner system, while having the advantages of modularity and interchangeability of parts and thus great flexibility in tactical use, is too heavy as a rifle, and too expensive and somewhat over-complicated in general. It is also somewhat dirt-sensitive and requires much attention and maintenance.
Overall, some 3,500 to 4,000 Stoner 63 weapon kits were produced between 1962and 1971.

The Stoner 63 is more than just a single firearm; it is a modular kit, which contains about 15 sub-assemblies. Different combinations of those sub-assemblies (barrels, feed units, trigger units, sight units) allow the assembly of various firearms on the single receiver unit.
The stamped steel receiver contains an universal bolt group, with a multi-lug rotating bolt and a long stroke gas piston with gas tube. The receiver also has several sets of mounting points for attachment of all other sub-assemblies and the quick-detachable barrel. In rifle and carbine configuration, the receiver is so orientated that the gas system lies above the barrel and the feed unit mounting points are below the receiver. In all machine gun configurations, either belt or magazine fed, the receiver is turned “upside down”, with the gas system being below the barrel, and the feed unit being above the receiver. In rifle / carbine configuration the Stoner 63 systemutilizes a hammer-fired trigger unit, integral with the pistol grip and triggerguard. This trigger unit allows for single shots and full auto fire, and the gun is fired from a closed bolt only. In machine gun configuration, the trigger unit has no hammer; instead, its sear interoperates with the cut in the gas piston rod, allowing only full automatic fire, and only from an open bolt. The magazine feed unit can accommodate proprietary curved box magazines for 30 rounds, and can be used both in rifle and machine gun configurations. The belt feed unit could be used only in machine gun configurations. Different rear sight units were available for various configurations, with the front sights being mounted on quick detachable barrels.

On earlier Stoner 63 system weapons, the charging handle was located on the right side of the bolt carrier; the safety and fire selector were combined in one control, located on the left side of the trigger unit. On the modified Stoner 63A system, the charging handle was attached to the gas piston rod, and projected from the top in rifle / carbine configuration, or from the bottom in MG / LMG configurations; the safety was made as separate lever at the front of the trigger guard, with the fire mode selector still located on the side of the trigger unit, above the pistol grip. TheStoner 63 system featured a variety of easily detachable fixed or folding buttstocks. The latter were available in a side-folding plastic variety, or in an under-folding stamped steel type

FN SCAR

FN SCAR

FN SCAR

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Mk.16SCAR-L (Light) Mk.17 SCAR-H (Heavy)
Caliber 5.56×45 NATO 7.62x51NATO basic
7.62×39 M43 and others additionally
Overall length, standard configuration 850 mm(max) / 620 mm (min) 997 mm (max) / 770 mm (min)
Barrel length 172mm/6.5″ (PDW), 254mm/10″ (CQC), 355mm/14″ (Std), 457mm/18″ (LB) 330mm/13″(CQC), 406mm/16″ (Std), 508mm/20″ (LB)
Weight 3.5kg empty 3.86 kg empty
Rate of fire 600 rounds per minute 600 rounds per minute
Magazinecapacity 30 rounds standard 20 rounds (7.62×51 NATO)
30 rounds (7.62×39 M43)

 The US Special Operations Command(US SOCOM) issued a solicitation for the procurement of SOF CombatAssault Rifles (SCAR)on October 15th, 2003. This solicitation requested a new combat rifle,specially tailored for the current and proposed future needs of the US Special Forces,which are somewhat different from then current US Army requirements,which were being fulfilled (unsucessfully) by the newest Heckler-Koch XM8 assaultrifle. The key difference in basic requirements between XM8 and SCAR was that, while XM8 was a single-caliber weapon system, tailored for 5.56x45mm NATO ammunition, the SCAR would be available in various different calibers. Initial SOF requirements included two basic versions of SCAR system – the SCAR Light (SCAR-L), available in 5.56mm NATO, and the SCAR heavy (SCAR-H), which should be initially available in significantly more powerful 7.62×51 NATO chambering, and should be easily adaptable in the field to other chamberings (this still is not the case).The key idea of SCAR rifle system is that it will provide the Special Forces operators with wide variety of options, from short-barreled 5.56mm SCAR-L CQC variation,tailored for urban close combat, and up to long range 7.62×51 SCAR-H Sniper variant. Both SCAR-L and SCAR-H are available in three basic versions, Standard(S), Close Quarters Combat (CQC) and Long Barrel (LB). All these variants, regardless the caliber and exact configuration, willprovide the operator with the same controls layout, same handling and maintenance procedures, and same optional equipment, such as sights,scopes, andother current and future attachments. Since 2014, an even shorter version of the SCAR-L is available as SCAR-L PDW – Personal Defense Weapon.

Late in 2004 USSOCOM announced, that the winner for the initial SCAR contracts is the FN USA, an US-based subsidiary of the famous Belgian company Fabrique Nationale Herstal. Зrototype rifles were manufactured by FN Manufacturing Inc, US-based subsidiary to FN Herstal; This company will also handle series production of rifles. Starting mid-2005, first SCAR rifles went to end users in US Special Operation Forces. Since USSOCOM uses Navy-type “mark” designations, SCAR rifles were officially designated as 5.56mm Rifle Mark 16 (SCAR-L / Light) and 7.62mm Rifle Mark 17 (SCAR-H/ Heavy). Despite original plans, only 7,62mm SCAR-H rifles are in current service with Us Special Forces. However, SCAR system enjoys steady and growing sales worrldwide, with numerous Special Forces buying both 5.56mm and 7.62mm versions. Finally, it seems that Belgian army is adopting 5.56mm SCAR-L as a general issue infantry rifle, to replace aging 5.56mm FN FNC rifles which are no longer made by FN.

All variants of FN SCAR rifles feature gas operated,short stroke piston action with rotating bolt locking. Bolt has seven radial locking lugs that lock directly into the barrel extension.
Receiver is made from two parts, upper and lower, connected with two cross-pins. Upper part is made from extruded aluminium, lower part is made from polymer. SCAR-L and SCAR-H use similar upper receivers that differ only in the size of ejection port. Other different parts include caliber-specific bolts, barrels, and lower receivers with integral magazine housing. Parts commonality between SCAR-L and SCAR-H is an astonishing 90%. Barrels are quick-detachable, and held in the upper receiver with two cross-bolts. Barrel change procedure requires minimum amount of tools, takes just several minutes and there is no need to adjust the headspace after the change.
The trigger unit with ambidextrous safety-fire mode selectors witch allows for single shots and full automatic fire, with no provisions for limited-length bursts mode. The charging handle could be easily installed on either side of the weapon, so the upper receiver has respective cuts on both sides. Top of the upper receiver is covered by the full-length integral Picatinny rail (MIL-STD 1913); additional Picatinny rails are mounted on both sides and under the free-floating handguards. Side-folding polymer buttstock is adjustable for length of pull, and is shaped to provide positive cheekrest with adjustable cheek support. SCAR rifles are fitted with removable, adjustable iron sights, with folding diopter-type rear sight on the receiver rail, and folding frontsight onthe gas block. Any additional type of sighting equipment, necessary for current tasks, including telescope and night sights, can be installed using MIL-STD 1913 compatible mounts.
Mk.16 SCAR-L rifle uses any 5.56mm STANAG (M16-type) magazines; Mk.17 SCAR-H uses proprietary 20-round magazines in 7.62×51 NATO.
Special thanks to Charles Cutshawfor invaluable information and images

Khaybar

kh2002

KH2002 Khaybar

kh2002

Caliber: 5.56×45 mm
Action: Gas operated, rotating bolt
Overall length: 730 mm (with “medium” barrel)
Barrel length: n/a
Weight: 3.7 kg with empty magazine
Rate of fire: 800-850 rounds per minute
Magazine capacity: 30 rounds

Khaybar KH 2002 assault rifle is a recent development of the Iranian Defense Industry Organization; this rifle was first shown in 2004 and is intended to replace the obsolete 7.62×51 HKG3 rifles of German origin, which are license-built in Iran since the Shahtimes. Khaybar KH 2002 assault rifle can be best described as a bullpup conversion of the Iranian S-5.56 rifle, which is a direct copy of the Chinese CQ assault rifle.

Khaybar KH 2002 assault rifle is gas operated, selectively fired rifle of bullpup layout. It uses M16-type direct gas system with multi-lugrotary bolt locking. Polymer pistol grip with enlarged trigger guard is attached below the tubular barrel shroud. Safety / fire selector lever is located at the left side of the receiver, behind magazine housing and away from the pistolgrip. Ejection is to the right side only. Feeding system uses M16-compatible magazines, with M16-style magazine release button located on the right side of the magazine housing. Sights are of open type, with rear sight being installed within a carrying handle. Additional equipment includes lightweight folding detachable bipods and knife-bayonet. According to the manufacturer, rifle is available with three styles of barrels: short(carbine), medium (standard rifle) and long (designated marksman rifle).