The Gen 4 Micro Bastard in the 5/8×24 .30 Cal nitrided version from American Precision Arms is a precision-engineered muzzle brake that delivers serious recoil reduction in a remarkably compact and lightweight package. Its nitrided steel construction provides durability and corrosion resistance while maintaining a sleek, tactical finish. With its 5/8×24 threading, it is compatible with many .30-caliber rifle barrels and conversions. The self-timing lock-nut design simplifies installation—eliminating the need for crush washers or shims—and guarantees perfect port alignment consistently. The fourth-generation upgrades include fine-tuned Bastard port geometry and tunable top ports designed to flatten the shooting trajectory by reducing muzzle climb, while also smoothing the recoil impulse so the shoot-feel is softer without sacrificing performance. At roughly 0.85" outside diameter, around 2.4" in length and weighing about 2.3oz, it fits sporter-weight barrels without adding unnecessary bulk. Ideal for hunters or precision shooters seeking premium recoil control in a minimal footprint. American Precision Arms Gen 4 Micro Bastard 5/8x24 .30 Cal Nitrided Self Timing Muzzle Brake G4M5830N