The Gen 4 Micro Bastard in stainless steel is a precision-engineered muzzle brake built for 6.5mm-caliber applications on barrels with 5/8×24 threading. Designed with a compact profile, the brake offers minimal weight and length while delivering elite-level recoil and muzzle-rise control. Its self-timing lock-nut system ensures consistent port alignment and hassle-free installation—no crush washers or shims required. Crafted from corrosion-resistant stainless steel and featuring APA’s refined “Bastard” port geometry and internal manifold, this brake blends durability, precision, and performance. Ideal for hunters and precision shooters who demand top-tier control from a lightweight, sporter-friendly build. American Precision Arms Gen 4 Micro Bastard 5/8x24 6.5mm Stainless Self Timing Muzzle Brake G4M5865S