The advanced SureFire SFMB-556-1/2-28 muzzle brake, which fits M4 / M16 weapons
and variants with 1/2-28 muzzle threads, greatly reduces both recoil impulse and
muzzle rise so that the weapon tracks straight back to keep you on target for
faster shot-to-shot recovery. Its patented Impulse Diffusion design minimizes
side blast and rear-directed concussion effects. The SFMB-556-1/2-28 also serves
as a rock-solid mounting adapter for SureFire SOCOM Series 5.56 mm Fast-Attach®
suppressors, the SOCOM556-RC model having placed first in the most extensive and
rigorous suppressor testing ever conducted by US Special Operations Command.
Precision machined from US mill-certified heat-treated stainless steel bar
stock—including high-precision single-point cut threads for optimum thread
interface—the SFMB-556-1/2-28 muzzle brake is given a black Ionbond DLC coating
to provide maximum protection under harsh environmental conditions and to
facilitate cleaning even after extreme use.
When used in conjunction with a SOCOM Series suppressor, the patent-pending
design of the SFMB-556-1/2-28 provides multiple bearing surfaces to ensure
superior suppressor alignment. A rear labyrinth seal minimizes potential carbon
buildup in the indexing system and facilitates suppressor removal after extended
All SureFire SOCOM Series muzzle brakes have blind pilot holes at the 3 and 9
o’clock position to enable fine-tuning of recoil characteristics for individual
shooting styles or ammunition characteristics. They also have blind pilot holes
at the 6 o’clock position to enable indexing the adapter at bottom dead center,
and to pin-and-weld on short-barreled rifles. All that is required is a basic
hand drill and appropriate drill bits.
SureFire muzzle brakes are individually inspected for concentricity and
alignment, and each is covered by SureFire’s No-Hassle Guarantee.
FITS: M4, M16 and variants wih 1/2-28 muzzle threads
MOUNTS: All SureFire SOCOM Series 5.56mm/.223 caliber sound suppressors
NOTE: SureFire SOCOM Series Fast-Attach sound suppressors and
current-model muzzle brake/suppressor adapters and flash hider/suppressor
adapters are not compatible with previous SureFire Fast-Attach sound
suppressors, muzzle brakes, or flash hiders.