Yankee Hill sRx Q.D. Muzzle Brake Long 5/8x24 Black Phosphate Steel

The Yankee Hill sRx Long Quick-Detach Muzzle Brake is purpose-built for shooters who want effective recoil control and a clean, repeatable mount for sRx-pattern sound suppressors. Machined from heat-treated 4140 steel and finished in low-glare black phosphate, this muzzle device is built to handle hard use on rifle and pistol-caliber carbine barrels threaded 5/8x24.

The sRx system locks this brake solidly to the barrel and serves as the mounting interface for any suppressor equipped with the matching sRx collar. Once the Low Profile Adapter is in place, the host suppressor (with its 1.375x24 thread pattern) threads on by hand without timing or shims, and detaches just as quickly. That makes swapping between unsuppressed and suppressed configurations fast and tool-free.

The brake measures 2.30" overall, adds roughly 1.675" to a barrel with 0.6" of thread engagement, and carries a slim 0.9375" outer diameter that keeps the host gun from looking or feeling bulky up front. Total weight is a modest 1.92 oz, so handling stays balanced. The black phosphate finish blends with factory and aftermarket barrel treatments and shrugs off the elements in the field.

Designed for any 5/8x24 barrel - including common 9mm pistol-caliber carbine hosts and many .308/7.62 platforms - the Yankee Hill 4405MB24 Long sRx Muzzle Brake is a compact piece of hardware that pulls double duty as a brake and a suppressor mount.