The advanced Surefire SF-FH556RC-1/2-28 four-prong flash hider, which fits M4/M16 weapons and variants with 1/2x28 muzzle threads, features a design that greatly reduces muzzle flash—typically greater than 97%—when compared with a plain muzzle. Boasting robust tines built to withstand the rigors of combat, the FH556RC-1/2-28 also serves as a rock-solid mounting adapter for SureFire SOCOM Series 5.56 mm Fast-Attach® suppressors, the SOCOM 556-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—and including high-precision single-point cut threads for optimum thread interface
When used in conjunction with a SureFire SOCOM Series suppressor, the design of the SureFire provides multiple bearing surfaces to ensure superior suppressor alignment and to prevent the audible ringing of tines inside the suppressor. A rear labyrinth seal minimizes potential carbon buildup in the indexing system and facilitates suppressor removal after extended firing.
Charlie's sources these as new and also new take-off, so all new. We do not differentiate between the two, so yours may not be in a Surefire bag, but last time we checked, they look the same when they are installed. :)
Note: Shims and Rockset are not included.
We do offer the shims from Knights Armament or Surefire here
. We do this as a courtesy, and do not really look for people to buy these, except with a flash hider purchase. Make sense ?FITS:
M4, M16 and variants MOUNTS:
All SureFire SOCOM Series 5.56mm/.223 caliber sound suppressors NOTE: SureFire SOCOM Series Fast-Attach sound suppressors, flash hider/suppressor adapters, and muzzle brake/suppressor adapters are not compatible with previous SureFire Fast-Attach sound suppressors, muzzle brakes, or flash hiders.