The CMMG Zeroed Muzzle Mount (brand part no. 57DA56C) is a 5.56 SVD-style muzzle brake machined to the same exterior dimensions as a mil-spec A2 flash hider, so it looks and mounts like a standard muzzle device while adding direct QD attachment for CMMG’s DEFCAN-556 and DEFCAN-762 suppressors. Threaded 1/2-28, it’s built for shooters running a QD suppressor host who don’t want a bulky adapter changing their rifle’s front-end profile. It also doubles as a pin-and-weld solution, bringing a 14.5-inch barrel up to the legal 16.1-inch overall length with everything needed for a permanent, compliant attachment (welder and welding skill not included). Finished in black, it’s a clean, dual-purpose upgrade for any 5.56 AR-15 build.

Key Specifications

• Threaded 1/2-28 to fit standard 5.56 AR-15 barrels.
• Matches the exterior dimensions of a mil-spec A2 flash hider for a familiar profile.
• Provides direct QD attachment for CMMG DEFCAN-556 and DEFCAN-762 suppressors.
• Doubles as a pin-and-weld device to bring a 14.5-inch barrel to the legal 16.1-inch overall length.
• Includes everything needed for permanent attachment aside from welding equipment and labor.
• Finished in black to match most AR-15 builds.

Frequently Asked Questions

Does this work with any suppressor? It’s built for direct QD attachment with CMMG’s DEFCAN-556 and DEFCAN-762 suppressors.

Can it be used for a pin-and-weld build? Yes, it includes everything needed to pin and weld a 14.5-inch barrel up to the legal 16.1-inch overall length (welding equipment and skill not included).

What thread pitch does it use? Standard 1/2-28, fitting most 5.56 AR-15 barrels.

Buy the CMMG Zeroed Muzzle Mount

Add QD suppressor readiness without changing your rifle’s profile. Order the CMMG Zeroed Muzzle Mount from our AR muzzle device selection at our Lubbock, Texas gun shop, and our team will have it ready as soon as it’s available to ship.