The American Precision Arms Gen 4 Fat Bastard Self Timing Muzzle Brake in 6mm is built for shooters who want flatter recoil and more control from every shot. Its nitrided steel construction, 3.30-inch overall length, and 1.10-inch diameter work together with APA’s calibrated U.R.P tunable top ports to keep the rifle planted and the sight picture steady.

This self-timing design threads directly onto 5/8"x24 muzzles and allows easy, repeatable installation without shims, making it well suited for precision rifles used in competition, long-range hunting, and extended range sessions. By carefully managing gas flow and reducing vertical movement, it helps shooters stay on target for faster follow-up shots while reflecting American Precision Arms’ focus on thoughtful engineering and refined performance.

Key Features:

• Manufacturer: American Precision Arms
• Model: Gen 4 Fat Bastard
• Caliber: 6mm
• Thread Pattern: 5/8"x24
• Overall Length: 3.30 inches
• Diameter: 1.10 inches
• Finish: Nitride
• Series: Self Timing