Mission First Tactical EvolV 3 Prong Ported Muzzle Brake - Reduces muzzle brake with the aid of 4 ports on top. The 2 ports on either side direct gas horizontally keeping recoil to a minimum. The front three prongs help direct the remaining gas and concussion forward from the shooter. All these elements make up a very comfortable muzzle brake for indoor and outdoor shooters. Where other muzzle brakes direct gas only horizontally MFT's comp takes it a step further. For 5.56/.223 caliber 2 port design for lateral gas dispersion aids in reducing recoil 4 top port design aids in keeping the muzzle brake down 3 prong design aids in directing gas and concussion forward and away from shooter 416 Stainless Steel Black Nitride Finish Milspec Crush Washer Included 17PH4 Stainless Steel pre-hardened