Surefire 4-Prong flash hider - fast attach 215A

fast ship item

Surefire 4-Prong flash hider - fast attach 215A 

the original 4-prong flash hider

model FH556-215A

The FH556-215A is a high-performance flash hider for the Colt Commando, M4, M16, HK416, and to other 5.56 mm semi-auto, bolt-action, or assault rifles with Mil-Spec 1/2-28 muzzle threads. It also serves as a precision, rock-solid adapter mount that enables rapid no-tools attachment of SureFire FA556K, FA556-212, FA556MG, or MINI suppressors to these rifles or to other rifles with the same muzzle thread/configuration.

The end of this adapter has 4 open prongs.

SureFire flash hiders deliver superior muzzle flash suppression. This provides three benefits—minimizing degradation of your night-adapted vision, helping to conceal your position, and reducing muzzle rise. Machined from heat-treated stainless steel, finished in a tough, corrosion-resistant coating, all SureFire flash hiders are extremely resistant to gas and particle erosion and will perform perfectly for thousands of rounds.

NOTE: SureFire muzzle brakes and flash hiders also serve as adapter mounts for our Fast-Attach® sound suppressors. If you do not plan to attach a SureFire sound suppressor to your firearm, we recommend choosing a shorter-length muzzle brake or flash hider. SureFire muzzle brakes and flash hiders that mate with our overlap suppressor models are longer in order to extend rearward over the barrel, a feature that is unnecessary unless mounting an overlap suppressor.


  • Provides rock-solid suppressor attachment in seconds without tools
  • Precise tolerances provide minimal and consistent zero shift regardless of number of attach/detach cycles
  • Acts as high-efficiency flash hider when suppressor is removed
  • Extreme resistance to heat and gas/particle erosion
  • Installation requires no permanent modifications to most weapons


Package includes:


  • Surefire 4-prong Fast Attach flash hider
  • a variety of shims
  • small container of Rocksett (this could dry-up over time, and need to be replaced)
  • no wrench is included
  • may ship in retail pack, or in small plastic bag (occaisionally we need to remove retail packaging to save on space in our storage bins)


Charlie's recommends installation by a gunsmith or qualified armorer.  While this can be a DIY project, it is important to get the timing correct and also to apply the correct Rockset to assure your mount does not cause damage to your suppressor.