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Robinson Arms XCR
From Wikipedia, the free encyclopedia
| RA XCR | |
|---|---|
 An early prototype of the CQB XCR |
|
| Type | Assault rifle |
| Place of origin |  United States |
| Production history | |
| Designer | Alex Robinson |
| Designed | 2004 |
| Manufacturer | Robinson Armament Co. |
| Produced | 2004-Present |
| Variants | Carbine, CQB SBR, Marksman (SPR) |
| Specifications | |
| Weight | 7.5 lbs |
| Length | 991 mm (39 in) |
| Barrel length |
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|
|
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| Caliber | 5.56x45mm NATO, 7.62x39mm, 6.8 mm SPC, 6.5 mm Grendel, any other calibers that will fit a 5.56 mm envelope |
| Action | Kalashnikov type long-stroke piston/ Rotating bolt |
| Rate of fire |
|
| Muzzle velocity | 975 m/s (2,900 ft/s) |
| Effective range | 550 m (600 yd) |
| Feed system | |
| Sights | Picatinny railing |
The Robinson Armament XCR is a multi-caliber, gas piston weapon system developed by Robinson Armament Co. for U.S. Special Operations Command (SOCOM) to satisfy the requirements of the SOF Combat Assault Rifle[1], or SCAR competition, but was disqualified on a technicality due to late delivery of blank firing adapters. Robinson Armament continued development and the XCR is now being offered to law enforcement, the military and general public. Deliveries of the rifle began in mid-2006.
Contents |
The XCR can be converted to various calibers and barrel lengths within a few minutes due to the highly modular design without the need for a highly trained armorer. Other features include a folding stock which eases storage space consumption and deploying from a vehicle (with optional fixed stock or M4 Carbine style stocks for those that prefer length of pull adjustments), a monolithic top Picatinny rail with side and under-barrel rails, and forward assist in the left-side charging handle. The XCR utilizes a heavy duty bolt and extractor connected to an AK47 type gas piston. The bolt and extractor are especially designed and patented by RA, and promoted as offering higher performance over M16/M4 type bolts. The first 25 XCRs released to the civilian market featured soft sears and were recalled to prevent slam fires.
The XCR is a multi-caliber weapon system. The base platform is chambered in 5.56 NATO. Caliber conversions are easily achieved by changing to the appropriately chambered barrel and bolt. Conversions can be done in two-three minutes.
The XCR employs a Kalashnikov type, gas operated action with a large, robust bolt carrier attached to a long stroke gas piston; the gas chamber is located above the barrel.
The proprietary bolt is over-engineered, using a massive three-lug design that locks onto the barrel extension leaving the upper receiver unstressed. There is no need to check the headspace when changing barrels. A steel fixed ejector is attached to the inside of the receiver, held in place by by two bolts. Not only is this design impressively reliable, but it provides far stronger extraction than what is offered on the AR15’s spring loaded ejector design.
Magazines are STANAG_4179 type.
The upper receiver is made from extruded anodized aluminum, and non-stressed. It features a non-reciprocating charging handle on left side which also acts as a forward assist.
The quad rail system is integrated into the upper receiver and compatible with most 1913 picatinny devices. The top rail is monolithic and 17” long, providing a rigid, uninterrupted plane for mounting optics and BUIS (Backup Iron Sights); the 3, 6, and 9 O'clock Position Rails are 8" long.
- ^ SOF is an abbreviation for Special Operations Forces.