This rifle is the newest incarnation of the wildly popular AR-50 chambered for the powerful 50 BMG cartridge. A single shot bolt action rifle featuring a unique octagonal receiver bedded down into a V-shaped stock. Designed to be an economical answer for the challenges of long range shooting the AR-50A1 is amazingly accurate and with its massive fluted muzzle brake it has a very gentle recoil. The AR-50A1 is a highly refined rifle which is a stark and refreshing difference that maintains its superiority over its competition. - Armalite�s great .50 has been refined with smoother action attractive new bolt stop and even greater strength than the original AR-50. The same great accuracy but now even more beautiful. - Caliber: .50 BMG - Barrel: 30� Chrome moly - Rifling Twist: 1:15� RH - Muzzle Device: Highly efficient multi-flute recoil check - Front Sight Base: Modified octagonal form grilled and slotted for MIL-STD 1913 scope rail with boss to engage Cross-Slot on receiver - Stock: 3-section stock -- extruded forend machined grip with vertical grip forward and machined removable - Bolt: Triple front locking lug - Ejector: Spring loaded plunger automatic ejection - Extractor: Sako type - Trigger: Shilen standard single-stage approximately 5 lbs. pull - Finish: Hard anodized aluminum manganese phosphated steel - Overall Length: 58.5� / 49.8� (Without Buttstock) - Weight: 34.1 lbs. - Included: 15 minute sight base ear plugs owner's manual - Warranty: Limited lifetime warranty