American Precision Firearms Gen 4 Fat Bastard Muzzle Brake, Nitride, 6.5mm

The American Precision Firearms Gen 4 Fat Bastard Muzzle Brake in 6.5mm (brand part no. G4F5865N) is a self-timing brake finished in nitride and threaded 5/8×24, built for shooters running 6.5mm precision cartridges who want flatter recoil on target. American Precision Firearms designed the Gen 4 line around calibrated, tunable top ports tested for size, location, and gas flow to virtually eliminate vertical muzzle movement, keeping the sight picture on target between shots. The nitride finish adds corrosion resistance beyond what a bare steel brake would offer.

Key Specifications

• Bored for 6.5mm projectiles, matching the brake to the caliber for optimal gas redirection.
• Threaded 5/8×24, a common precision rifle thread pitch.
• Finished with nitride coating, adding corrosion resistance over bare steel.
• Features self-timing installation, so the brake indexes correctly without shims.
• Uses tunable top ports, calibrated for maximum vertical recoil control.
• Measures 3.30 inches overall length and 1.10 inches in diameter, a compact footprint for most builds.

Frequently Asked Questions

What caliber is this brake designed for? It is bored for 6.5mm projectiles.

What finish does this brake use? It is finished with a durable nitride coating for extra corrosion resistance.

Buy the American Precision Firearms Gen 4 Fat Bastard Muzzle Brake

6.5mm precision shooters looking to tame recoil without giving up sight picture between shots will benefit from the Gen 4’s tunable, self-timing design. Order it through our Lubbock, Texas gun shop and browse more AR muzzle devices from American Precision Firearms and other top brands.