The 3P Eliminator three-prong flash hider, fits M4/M16 weapons and variants with 1/2x28 muzzle threads. It features a patent-pending design that greatly reduces muzzle flash typically greater than 99 percent when compared with a plain muzzle. Precision machined from US mill-certified steel bar stock including high-precision single-point cut threads for optimum thread interface the SureFire 3P Eliminator muzzle brake has a black Melonite finish that provides maximum protection under harsh environmental conditions and facilitates cleaning even after extreme use. NOTE: This model cannot be used to mount SureFire SOCOM suppressors.