The Barrett M107A1 is a semi-auto .50 BMG rifle from Barrett Firearms (brand part no. 20183), built on the same combat-proven platform fielded by U.S. and allied military units worldwide. This shorter-barrel configuration pairs a 20-inch fluted barrel with a full-length Picatinny rail receiver and M-LOK handguard, trimming overall length and weight compared to longer M107A1 builds while keeping full .50 BMG capability on tap. A quick-detach bipod attaches directly to the forend for a stable firing position, and a modular rear grip mounted on the receiver’s M1913 rail accepts an optional monopod for extra stability at the shoulder. For shooters who want .50 BMG performance in a more compact, easier-to-maneuver package, this 20-inch M107A1 is built to deliver.

Key Specifications

• Chambered in .50 BMG, this rifle delivers serious long-range stopping power in a shorter package.
• A 10+1 capacity keeps a follow-up round ready between magazine changes.
• The 20-inch fluted barrel trims weight and overall length compared to longer M107A1 configurations.
• A 1:15-inch rate of twist stabilizes heavy .50 BMG projectiles for consistent accuracy.
• The semi-auto action cycles each round automatically for fast, repeatable follow-up shots.
• A full-length Picatinny rail receiver gives shooters a solid mounting platform for optics.
• The M-LOK handguard allows direct attachment of bipods, lights and other accessories without adapters.
• A quick-detach adjustable bipod attaches at the forend for a steady supported or prone shooting position.
• A modular rear monopod grip on the receiver’s M1913 rail adds extra stability at the shoulder.
• The muzzle brake is built to accept a Barrett QDL suppressor when signature reduction is needed.

Frequently Asked Questions

Why choose the 20-inch barrel over a longer M107A1? The 20-inch fluted barrel trims weight and length for a more maneuverable rifle while keeping full .50 BMG performance.

Is this rifle semi-auto? Yes, the M107A1 cycles semi-automatically, firing one round per trigger pull.

Does it come with a bipod? Yes, a quick-detach adjustable bipod attaches to the forend for a stable firing position.

Buy the Barrett M107A1, 20-inch Fluted Barrel

For shooters who want .50 BMG capability without the length and weight of a full-size M107A1, this 20-inch configuration trims the package down while keeping the same rail, handguard and bipod features that make the platform so capable. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse our full lineup of semi-auto rifles while you shop. If maneuverability matters as much as raw power, this shorter M107A1 is worth a serious look.