American Precision G4F3430S Gen 4 Fat Bastard Self Timing Muzzle Brake 3/4x24 / .30 / Stainless The APA Gen 4 Fat Bastard Muzzle Brake G4F3430S is a stainless, self-timing brake for .30 caliber rifles with 3/4x24 threads. APA G4F3430S features tunable top ports and a refined port design for superior recoil control, reduced muzzle rise, and a smoother shooting experience. Built for magnum calibers, it installs easily and is ideal for precision and competitive shooting. APA proudly introduces the Gen 4 Fat Bastard and Gen 4 Little Bastard—the latest evolution in muzzle brake technology. The APA Gen 4 Muzzle Brake represents a fusion of advanced engineering enhancements and valuable user feedback. As the long-range precision rifle community continues to grow and evolve, so do the expectations of today’s more refined and discerning shooters. These demands have challenged APA to innovate further—and the Gen 4 is the result of that commitment to performance and precision. American Precision Arms Gen 4 Fat Bastard Self Timing Muzzle Brake 3/4x24 / .30 / Stainless G4F3430S