SureFire | Muzzle Brake/Silencer Adapter | 223 Rem | 5.56 NATO

The SureFire SFMB is a SOCOM Fast‑Attach muzzle brake / suppressor adapter. Offset ports cut recoil impulse and muzzle rise so the rifle tracks straight back. Impulse Diffusion limits side and rear blast. Heat‑treated stainless steel, DLC coating, single‑point‑cut threads, multiple bearing surfaces, labyrinth seals at the lock ring. Family length 2.6 inches, 3.9 ounces. Not compatible with pre‑SOCOM Fast‑Attach hardware. This SFMB‑556‑1/2‑28 is 5.56 mm on 1/2‑28 threads, with blind pilot holes for recoil tuning or pin‑and‑weld.