Description
The ArmaLite AR-50A1 50 BMG Rifle is the refined version of ArmaLite’s popular AR-50, a single shot bolt action built specifically for the .50 BMG cartridge. Its octagonal receiver sits in a V-shaped stock, and a massive multi-flute muzzle brake tames the recoil of one of the most powerful rifle cartridges available to civilian shooters. This listing is ArmaLite model 50A1BGGG, UPC 651984021095.

ArmaLite AR-50A1 50 BMG Rifle Overview
ArmaLite designed the AR-50 as an economical answer to long range .50 caliber shooting. The A1 version improves on the original with a smoother action, a new bolt stop and greater strength, while keeping the accuracy the platform is known for. As a single shot 50 BMG, it has fewer moving parts than a magazine-fed rifle, which keeps cost down and reliability high.
Action, Barrel and Trigger
The bolt uses triple front locking lugs, a spring-loaded plunger ejector and a Sako-type extractor. The 30-inch chrome-moly barrel has a 1:15 right-hand twist, suited to the heavy bullets the .50 BMG uses. A Shilen standard single-stage trigger breaks at roughly 5 lb. The front sight base is machined octagonal with a slotted MIL-STD 1913 rail and a boss that engages the receiver cross-slot, giving a solid scope mounting platform.

Recoil Management
The multi-flute recoil check muzzle brake is what makes this long range rifle manageable. It redirects gas to the sides and cuts felt recoil dramatically, so most shooters find the ArmaLite AR-50A1 50 BMG Rifle surprisingly gentle to shoot from a bipod. The trade-off is serious muzzle blast to the sides; anyone near the shooter needs good hearing protection, and shooting from a covered firing line can be very loud.
ArmaLite AR-50A1 50 BMG Rifle Specifications
- Manufacturer: ArmaLite, model 50A1BGGG
- Caliber: .50 BMG
- Action: single shot bolt action, triple front locking lugs
- Barrel: 30″ chrome-moly heavy barrel, 1:15 RH twist, black phosphate
- Muzzle device: multi-flute recoil check brake
- Receiver: octagonal, black hard coat anodized, optics ready with 1913 rail
- Stock: 3-section V-shaped stock with forend and vertical grip, removable buttstock
- Trigger: Shilen standard single stage, about 5 lb
- Overall length: 58.5″ (49.8″ without buttstock)
- Weight: about 34.1 lb
- Included: 15 MOA sight base, ear plugs, owner’s manual; this listing includes a bipod and mount
- Warranty: limited lifetime
Note: our original title listed a 31″ barrel. ArmaLite’s specification and Sports South list this model with a 30″ barrel, which is what we show here.

Before You Buy the ArmaLite AR-50A1 50 BMG Rifle
.50 BMG ammunition is expensive, often several dollars per round or more, and many ranges do not allow .50 caliber rifles, so confirm you have a place to shoot it. At about 34 lb, this rifle is meant to be shot from a bench or prone with a bipod, not carried far. A few jurisdictions restrict or ban .50 BMG rifles, so check your state and local laws before ordering. You will also want a high-quality scope and rings rated for .50 caliber recoil.
Who the ArmaLite AR-50A1 50 BMG Rifle Is For
The ArmaLite AR-50A1 50 BMG Rifle is a great fit for long range enthusiasts who want to experience the .50 BMG at a reasonable price, collectors who want a classic 50 caliber rifle, and shooters stepping into extreme long range steel. If you want faster follow-up shots, ArmaLite also makes a magazine-fed AR-50 variant.
Buy the ArmaLite AR-50A1 50 BMG Rifle at MAG5 Firearms
MAG5 Firearms is a family-owned FFL in Collegeville, PA. Your rifle ships to your local FFL dealer for transfer, and all federal, state and local laws apply. Browse more firearms for sale or visit ArmaLite’s website for more on the AR-50 family.






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