|Robinson Armament XCR|
2004 Prototype CQB/SBR version of XCR
|Type||Automatic / Semi-automatic rifle|
|Place of origin||United States, Utah|
|Designer||Alex J. Robinson|
|Manufacturer||Robinson Armament Co.|
|Variants||XCR-L, XCR-PDW, XCR-M, XCR-Micro|
|Length||37.75" (Stock Extended); 27.4" (Stock Folded)|
|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||Gas-operated Kalashnikov type long-stroke piston/ Rotating bolt|
|Rate of fire||
|Muzzle velocity||792-990 m/s (2600-3250 ft/s)|
|Effective range||300-600 m (328-656 yd), depending on configuration|
|Feed system||30-round detachable box (5.56 variant) magazine, staggered-column magazine (STANAG compatible)|
The Robinson Armament Co. 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, 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. The XCR displayed to U.S. Army officials during an invitation-only Industry Day on November 13, 2008. The goal of the Industry Day was to review current carbine technology prior to writing formal requirements for a future replacement for the M4 Carbine.
The XCR utilizes a heavy duty bolt and extractor connected to an AK-47 type gas piston. The bolt and extractor are designed and patented by Robinson Arms, and promoted as offering higher performance over eight lug M16/M4 type bolts. Other features include a folding stock which eases storage space consumption and deploying from a vehicle, in addition to folding M4 Carbine style stocks for those who prefer length of pull adjustments; it also has a monolithic top Picatinny rail with side and under-barrel rails, and forward assist integrated into left-side charging handle. Approximately 5,000 XCR carbines have been sold since its introduction in 2006.
The XCR is a multi-caliber weapon system. The base platform is chambered in 5.56x45 NATO. Conversions are easily achieved by changing to the appropriately chambered barrel and bolt, and can be done in two to three minutes with typical household tools. 6.8 Remington SPC and 7.62x39 are the current conversion kits available. 6.5 Grendel was scheduled for future release, but is currently on hold due to technical hurdles
The XCR can be converted to various calibers and barrel lengths within a few minutes due to the modular design without the need for a trained armorer or specialized tools.
In addition to conversion kits, complete factory guns in the alternate calibers are also sold.
The XCR employs a Kalashnikov type, gas operated action with the bolt carrier attached to a long-stroke gas piston; the gas chamber is located above the barrel.
The proprietary bolt is a 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 two bolts. The manufacturer claims this design provides stronger ejection than what is offered on the AR-15’s spring loaded ejector design. The ejection pattern is to the two o'clock position of the operator, with an optimum distance of 15ft to 20ft depending on ammunition type and gas setting.
Magazines are STANAG 4179 type.
The upper receiver is made from anodized aluminum forgings, and is 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.
The XCR was designed in 2004 by Alex J. Robinson of Robinson Armament Co. Production of the XCR-L variant of the rifle began in mid-2006.
The XCR-L is currently available in 5.56mm, 6.8mm Remington SPC and 7.62x39mm cailbers. Each of these calibers is available in kit form for converting an existing rifle to one of the other calibers.
The 6.8 Remington SPC variant began shipping in November of 2007.
The 7.62x39mm rifles and conversion kits began shipping in July 2008.
Variants are also available in "California" versions which are limited to meet the more restrictive State of California firearms laws.
Since its introduction in 2006, components of the XCR have been updated. Most of these enhancements are available to existing XCR owners.