The American Precision Arms Gen 4 Little Bastard (American Precision Arms part no. G4L5865N) is a self-timing muzzle brake built for 6.5mm-bore rifles, threaded 5/8×24 with a 2.70-inch overall length and a 1-inch outside diameter. Its calibrated, tunable top ports are engineered for maximum adjustment, letting the Gen 4 line achieve some of the flattest-shooting performance available in a brake this size. American Precision Arms tests port size, location, and gas feed to eliminate vertical muzzle movement, so recoil is managed mostly in the horizontal plane rather than kicking the muzzle up between shots. The nitride finish adds corrosion resistance for a brake meant for serious round counts.

Key Specifications

• Built for 6.5mm-bore rifles.
• Threaded 5/8×24.
• Measures 2.70 inches overall with a 1-inch outside diameter.
• Uses a self-timing design so the brake indexes correctly without a crush washer or shims.
• Features calibrated, tunable top ports engineered to eliminate vertical muzzle rise.
• Finished in nitride for corrosion resistance.

Frequently Asked Questions

What bore size is this brake built for? 6.5mm.

What makes the top ports tunable? They are calibrated for maximum adjustment, letting the brake be tuned to minimize vertical muzzle movement.

Buy the American Precision Arms Gen 4 Little Bastard Muzzle Brake

Get some of the flattest-shooting recoil control available in a compact brake for your 6.5mm rifle. See more from American Precision Arms or shop our full lineup of gun accessories and parts. Order it from our Lubbock, Texas gun shop for fast, insured shipping.