YHM sRx Short Q.D. Muzzle Brake | 5/8×32 | YHM-4445MB32

The Yankee Hill Machine (YHM) sRx Short Q.D. Muzzle Brake is a compact attachment engineered for the YHM sRx suppressor mounting system. This short brake is designed to interface with YHM sRx adapters (YHM-4400) and the industry-standard HUB mounting interface to provide a low-profile, quick-detach connection for compatible suppressors. It is presented in a dark phosphate finish and is intended for range use and precision shooting applications where a slim, repeatable mounting solution is desired.

Product Specifications

• The UPC is 841812101802.
• The manufacturer is Yankee Hill Machine.
• The model is listed as sRx.
• The manufacturer part number is YHM-4445MB32.
• The thread pattern is 5/8″-32 tpi.
• The device is designed to interface with the YHM sRx Q.D. adapter and HUB mounting system and therefore requires the YHM-4400 adapter for proper use.
• The description lists the material as 4140 Steel.
• The finish is listed as Black Phosphate.
• The muzzle device length is listed as 2.3 inches in one product note.
• An alternate listed length value is 1.6875 inches in product detail bullets.
• The length added to barrel (on barrels with 0.6″ threads) is listed as 1.675 inches.
• The listed diameter is 0.75 inches.
• The product weight is listed as 0.12 (as provided in source data).
• Additional features include a Q.D. mount for 30 Cal suppressors and that the unit includes a shim kit.
• The NFA thread pattern is recorded as 5/8X32.

This short sRx brake keeps a suppressor set up compact and visually low-profile while using the YHM sRx mounting system. Its slim design and the tapered seal ahead of the threads are intended to minimize gas and debris migration to the threaded interface and to provide a repeatable mounting location when used with the correct adapter. The brake’s compact footprint and modest weight make it a practical option for shooters prioritizing a minimal added length and a clean aesthetic for suppressor-equipped rifles.