Spikes Tactical SBV1017 Dynacomp Extreme Muzzle Brake Black Nitride 416R Stainless Steel with 1/2"-28 tpi Threads & 2.25" OAL for 5.56x45mm NATOThe Spike's Tactical Dynacomp is a muzzle device designed to reduce recoil impulse and muzzle climb to provide faster follow up shots. The Dynacomp accomplishes this by balancing the direction of the blast along the vertical (upward) and perpendicular planes of the muzzle to lower muzzle rise, while the end of the device restricts forward energy to reduce parallel recoil. The ports on the Dynacomp are ball dimpled for smooth expansion of gases and