Wilson Combat TRQCOMP: Wilson Combat\'s Q-Comp Muzzle break enhances your tactical rifle shooting experience. The Q-Comp is a hybrid AR-15 brake/compensator that has been tuned to minimize side-blast and concussion. It almost zero muzzle flash yet retains excellent vertical and rearward recoil reduction with all calibers. The slotted expansion chamber design has no prongs or tines to break off or snag and is Melonite QPQ coated alloy steel for maximum durability and corrosion resistance. Included is a crush washer for easily installation. This model has 1/2\"x28 tpi threads.