SureFire's ProComp muzzle brake, fits AR10/LR308 rifles and variants with 5/8-24 muzzle threads. It greatly reduces both recoil impulse and feature neutral porting so brake loads bi-pod legs evenly to keep you on target for faster shot-to-shot recovery. The patented Impulse Diffusion design minimizes side blast and rear-directed concussion effects. Precision machined from US mill-certified steel bar stock including high-precision cut threads for optimum thread interface the ProComp muzzle brake has a black Melonite finish that provides maximum protection under harsh environmental conditions. NOTE: This model cannot be used to mount SureFire SOCOM suppressors.