Description
The Yankee Hill 4401MB28 is the sRx QD Mini Muzzle Brake rated for 9mm and machined from 4140 steel with a durable black phosphate finish. Built as the compact counterpart in YHM’s quick-detach sRx system, it threads onto a 1/2″-28 host barrel and mates to the matching sRx QD adapter for rapid attachment and removal.
Measuring just 1.10 inches overall with a 0.9375 inch diameter and a weight of only 1.024 oz, this mini brake is sized for slim 9mm pistol-caliber carbines, PCCs, and AR-pattern builds where minimal weight and a low profile matter. It uses the 1/2″-28 thread pitch standard for 9mm, and its QD interface accepts YHM’s sRx adapters built around the industry-standard HUB 1-3/8″x24 mounting thread.
The sRx system allows shooters to move a suppressor or switch between muzzle devices without unthreading the brake from the host barrel, and the steel construction with a black phosphate finish is built to handle the fast cycling and high round counts typical of 9mm platforms. Made in the USA by Yankee Hill Machine.
