Surefire WARCOMP flash hider / suppressor mount, closed end, 1/2×28 5.56mm

 
Surefire, WARCOMP, Flash Hider/Suppressor Adapter, Flash Hider, 1/2 x 28 RH, Black, AR Rifles, 5.56MM
Provides reduction in muzzle flash
Aids in muzzle rise reduction
Serves as rock solid mounting adapter for fast attach suppressors