The Yankee Hill Machine sRx QD Muzzle Brake, Long (brand part no. YHM-4405-MB-28) is the muzzle device half of YHM’s sRx suppressor system, cut to a 1/2-28 tpi thread for .223/5.56 NATO hosts and running about 2.30 inches overall. Finished in black phosphate steel, it must be paired with the YHM sRx Adapter (YHM-4400) to complete the mount, which uses an internal taper seal in front of the threads to lock a suppressor on and seal out gas and debris. As a standalone muzzle brake it also reduces felt recoil, and like the rest of the sRx line it needs no shimming or timing to the barrel.

Key Specifications

• Cut to a 1/2-28 tpi thread pattern.
• Rated for .223/5.56 NATO hosts.
• Long profile version of YHM’s sRx muzzle brake.
• Overall length of approximately 2.30 inches.
• Finished in black phosphate steel for corrosion resistance.
• Must be paired with the YHM sRx Adapter (YHM-4400) to complete the mount.
• No shimming or timing to the barrel required for installation.
• Internal taper seal design blocks gas and debris buildup on the mount threads.
• Adds only minimal length and weight to the overall suppressor setup.

Frequently Asked Questions

Does this muzzle brake work on its own? Yes, as a standalone brake it reduces felt recoil; pairing it with the YHM sRx Adapter (YHM-4400) also completes the QD suppressor mount.

What caliber and thread is this cut for? .223/5.56 NATO with a 1/2-28 tpi thread.

Buy the Yankee Hill Machine sRx QD Muzzle Brake, Long

Run a muzzle brake that doubles as a ready-made suppressor mount. Order the Yankee Hill Machine sRx Muzzle Brake from our Class 3 parts and accessories at our Lubbock, Texas gun shop for fast, direct shipping.