The American Precision Arms G4F5865S Gen 4 Fat Bastard Self Timing Stainless muzzle brake combines precision engineering with practical performance, delivering an exceptionally flat shooting result through its calibrated U.R.P tunable top ports designed for maximum adjustment and zero vertical movement. Built in stainless with a 5/8"-24 thread pattern, this Gen 4 brake measures 3.30 inches in overall length and 1.10 inches in diameter, optimally paired for 6.5mm platforms to manage recoil and muzzle rise without sacrificing accuracy. By carefully testing port size, location, and gas flow, AMERICAN PRECISION ARMS achieves a versatile brake that directs gas precisely where it helps most, enabling steadier follow-up shots and smoother recoil control. Whether mounted on precision rifles or sport shooters seeking consistent, hands-down performance, this brake leverages its self-timing design for straightforward installation and reliable performance right out of the box. The combination of a stainless finish, robust threading, and a purpose-built internal geometry makes the Gen 4 Fat Bastard a compelling choice for shooters who demand repeatable, flat-shooting results and a clean, professional look on the muzzle.