B&T 3-chamber APR type Compensator for Monoblock thread M18x1 cal. .308 Win is an advanced steel muzzle brake dedicated to sniper rifles Accuracy International AW/AX (and similar) in caliber .308 Win (barrel mounting with M18×1 or M18×1.5 thread). Equipped with 3 chambers, it significantly reduces recoil and muzzle rise more effectively than standard 2-chamber compensators, improving shot precision and stability without a suppressor, while also serving as a QD base for quick mounting of Monoblock B&T suppressors cal. .308 Win.