The Barrett M107A1 is a semi-automatic, recoil-operated rifle chambered in .50 BMG, built with a 20-inch fluted barrel and a Flat Dark Earth finish. It feeds from a detachable 10-round box magazine and uses a cylindrical muzzle brake designed to interface with Barrett's QDL suppressor. The rifle carries a full-length top rail, an M-LOK handguard, and a QD bipod-compatible forend. 
 

Key Specifications 

• Brand: Barrett 
• Model: M107A1 
• Caliber: .50 BMG 
• Action: Semi Auto 
• Capacity: 10 Rounds 
• Barrel Length: 20 in 
• Barrel Description: Fluted 
• Receiver Finish: Flat Dark Earth 
• Weight: 27.40 lbs 
   

Detailed Features 

• The 20-inch fluted barrel ends in a cylindrical muzzle brake built to interface with the Barrett QDL suppressor. 
• A full-length Picatinny top rail runs the receiver for mounting optics. 
• The M-LOK handguard and QD bipod-compatible forend support mounted accessories. 
• A rail-mounted rear grip accepts a lightweight monopod for added stability. 
• The rifle feeds from a detachable 10-round box magazine and uses a black polymer grip.

Owners of the M107A1 describe it as extremely well-built for a .50 BMG semi-auto, with the recoil-operated action cycling reliably even under sustained use. The fit and finish are generally seen as a refinement over the earlier M107, though a few owners note the rifle is still a serious commitment to feed and maintain given the caliber.

Handling a rifle this size is inherently a two-hands-and-a-bipod affair, and owners like the QD bipod forend and rail-mounted rear grip for stability at the bench or from a prone position. The Flat Dark Earth finish and M-LOK handguard draw praise for a modern look and easy accessory mounting, while some shooters mention the weight makes this a dedicated precision setup rather than something carried far.

Value opinions track with the category: buyers who want a .50 BMG semi-auto see the M107A1 as the benchmark and worth the investment, while others note that ammunition cost dominates the ownership experience more than the rifle's price. Aftermarket support centers on optics and bipods rather than the wide parts ecosystem common to smaller-caliber platforms.