Description
The SureFire SFMB-556-1/2-28 does two jobs. It functions as a standalone muzzle brake for 5.56 NATO barrels threaded 1/2x28, and it serves as the mounting adapter for SureFire's SOCOM Series Fast-Attach suppressors. If you plan to run a SOCOM can, this is the host device it indexes to.
The brake uses SureFire's Impulse Diffusion porting to redirect propellant gases in a way that reduces both recoil impulse and muzzle rise, keeping the bore tracking straight back rather than climbing. The design also works to minimize side blast and rearward concussion, which matters in close-quarters environments or when shooting from behind barriers. Offset porting drives the gas management, and multiple bearing surfaces on the mount face ensure the suppressor indexes consistently when attached.
The body is machined from U.S. mill-certified heat-treated stainless steel bar stock and finished with a DLC coating. Barrel threads are cut single-point for precision fit. Blind pilot holes on this model allow recoil characteristics to be tuned by the user with a basic hand drill and appropriate bits. Those same holes can be used for pin-and-weld compliance work.
- Caliber: 5.56 NATO
- Thread pitch: 1/2x28
- Material: Heat-treated stainless steel bar stock, U.S. mill-certified
- Finish: DLC coating
- Impulse Diffusion offset porting, reduces recoil impulse and muzzle rise
- Multiple bearing surfaces for suppressor alignment
- Single-point cut barrel threads
- Blind pilot holes for brake tuning and pin-and-weld
- Compatible mounting adapter for SureFire SOCOM Series Fast-Attach suppressors
Does this work as a standalone brake without a suppressor?
Yes. It functions as a muzzle brake on its own. The suppressor adapter interface is built into the same device, so you are not adding length or weight just to accommodate future suppressor use.
What suppressors does this mount?
It is designed specifically as the mounting interface for SureFire SOCOM Series Fast-Attach suppressors. Verify compatibility with your specific SOCOM can before ordering.
Can the pilot holes be used for pin-and-weld?
Yes. The blind pilot holes on this model support both recoil tuning and pin-and-weld permanent installation for short-barrel builds requiring a fixed muzzle device.
