YHM sRx Short QD Muzzle Brake | 5/8×24 | YHM-4445-MB-24

The YHM sRx Short Q.D. Muzzle Brake (YHM-4445-MB-24) is a compact muzzle device engineered for the YHM sRx suppressor mounting system. It uses a tapered seal in front of the threads to secure and seal compatible suppressors when used with the sRx adapter (YHM-4400). The design prioritizes a low profile and straightforward, no-shim installation while keeping added length and weight to a minimum.

Typical applications include dedicated suppressor-equipped rifles for range/precision work and use on lightweight precision builds where minimal muzzle length is desired. The device is listed for compatibility with .308 / 7.62 NATO and uses a 5/8×24 thread interface for sRx adapters.

Product Specifications

• The UPC is 841812101796.
• The manufacturer is Yankee Hill Machine.
• The model is listed as sRx.
• The manufacturer part number is YHM-4445-MB-24.
• The thread pattern is 5/8″-24 tpi.
• The NFA thread pattern is 5/8×24.
• The caliber/gauge is listed as .308 / 7.62 NATO.
• The finish is described as Black Phosphate.
• The outside diameter is listed as 0.75 inches.
• The product requires the YHM sRx adapter and must be paired with YHM-4400 to interface with sRx mounts.
• The product includes a shim kit.
• An additional feature is a Q.D. mount for 30 Cal suppressor.
• YHM describes the device as small/low profile and having no moving parts.
• The listed weight is 0.15 (as provided in source data).

The sRx Short Brake is intended for users seeking a discreet, low-addition solution for a threaded suppressor mount. Its tapered-seal interface and compact footprint make it a practical choice for suppressor-equipped sport and precision rifles where maintaining a clean profile and reliable mounting are priorities.