The Barrett M107A1 is a semi-automatic, recoil-operated rifle chambered in .50 BMG. It has a 29-inch barrel, weighs 12 lbs, holds 10 rounds, and ships with a 23-inch 27 MOA optics rail integrated into the lightweight aluminum upper receiver. Finish options are Flat Dark Earth or Black Cerakote. 
 

Key Specifications 

• Model: M107A1 
• Caliber: .50 BMG 
• Action: Semi-Automatic Recoil Operated 
• Barrel Length: 29 inches 
• Overall Length: 57 inches 
• Weight: 12 lbs 
• Capacity: 10 rounds (one magazine included) 
• Rate of Twist: 1:15 RH 
• Finish: Flat Dark Earth / Black Cerakote 
   

Detailed Features 

 
The M107A1 is a refinement of the M82A1 series. Key changes from earlier production include a thermal cheek rest, backup iron sights, and a bolt carrier and buffer assembly designed for suppressor use. The bolt assembly uses nickel Teflon coatings that reduce maintenance intervals in field conditions. 
 
The 27 MOA integral rail gives meaningful elevation advantage for long-range shooting without stacking as many adjustments onto the scope turrets. The lightweight aluminum upper receiver keeps the platform at 12 lbs, which is relatively manageable for a .50 BMG platform but still requires a bipod or rest for practical accuracy. 
 
Recoil operates through a short-recoil system with a muzzle brake that redirects gas and significantly reduces felt impulse. The M107A1 is suppressor-compatible by design, not as an afterthought.

The M107A1 generates strong respect for its engineering and long-range precision. Users who've shot it at 1,000+ yards consistently report accurate, reliable function. The semi-auto action is noted as a meaningful advantage over bolt-action .50 BMG platforms for rapid follow-up shots. Build quality and durability under hard use are praised.

Practical concerns dominate the critical side: the rifle is heavy, and the 57-inch overall length makes it awkward outside a bench or vehicle. .50 BMG ammunition is expensive and availability fluctuates. Recoil, while managed by the brake and operating system, still requires proper technique. Some users note the weight can be tiring over extended sessions even with a bipod. The gun is difficult to justify for casual range use given ammunition cost; it's primarily bought by collectors, dedicated long-range competitors, and military/law enforcement applications.