The American Precision Arms Gen 4 Fat Bastard Self Timing Nitride muzzle brake combines precision engineering with versatile performance, delivering the flattest shooting brakes available as part of the AMERICAN PRECISION ARMS lineup. Featuring a 5/8"-24 TPI thread pattern and a nitride finish, this Gen 4 unit is designed to install cleanly on 6.5mm rifles while offering a compact 3.30" overall length and a 1.10" diameter profile that preserves balance and handling. The calibrated U.R.P tunable top ports have been optimized through extensive testing of port size and gas flow to provide zero vertical movement, giving shooters a reliable reduction in recoil and muzzle rise without sacrificing predictability or control. By leveraging the self-timing design, the Fat Bastard maintains accurate timing with each shot, helping retain sight picture for rapid follow-ups. The result is a durable, low-profile muzzle device that enhances accuracy and consistency across a variety of shooting disciplines, making it an ideal choice for precision rifles and long-range applications where steady returns and repeatable performance matter most.