You can?t afford to stand around and wait for your eyes to recover from a bright muzzle flash and you definitely can?t afford to become an easy target. The Troy Medieval? Flash Suppressor instantly eliminates flash to maintain focus with enlarged light slots that effectively disperse flash. The aggressive diamond-shaped teeth can serve as a breaching device designed for close quarter battle. Features: Threaded for all M16/AR15/M4 rifles and carbines. 5.56/.223 (1/2 x 28 TPI) 2.25" OAL). Heat-treated ordnance steel construction.