Yankee Hill Machine | sRx Flash Hider | 5/8-24 | YHM-4405-24

The Yankee Hill Machine sRx Long Flash Hider (YHM-4405-24) is a low-profile muzzle device designed to work with the YHM sRx quick-detach adapter system. It provides a tapered interface to mate with the sRx adapter and helps form a consistent seal when a suppressor is attached. The device is finished in black phosphate and is offered in a 5/8-24 thread pattern for compatible barrels and adapters.

Common uses for this device include suppressor-equipped range and training use and precision or competition shooting setups that require a low-profile Q.D. mount. The sRx Flash Hider is intended to be paired with the YHM sRx adapter (YHM-4400) for proper operation.

Product Specifications

• The manufacturer is Yankee Hill Machine (YHM).
• The part number is YHM-4405-24.
• The model designation is sRx.
• The thread pattern is 5/8-24 tpi.
• The sRx adapter interface mates to HUB 1-3/8 x 24 threads on the adapter.
• The muzzle device length is 2.300 inches.
• The outside diameter is 0.9375 inches.
• The finish is listed as Black Phosphate.
• The package includes a shim kit.
• This device is designed as a Q.D. mount for .30 caliber suppressors when used with the sRx adapter.
• The UPC is 841812101550.

The sRx Long Flash Hider is a compact, purpose-built muzzle device intended to integrate with the YHM sRx mounting ecosystem. Its tapered front and low profile reduce protrusion while providing a consistent interface for quick-detach suppressor mounting. For shooters building a suppressor-ready rifle or configuring a low-profile range setup, this device offers a straightforward mechanical interface that emphasizes repeatable alignment and minimal added length.

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