The M4SD Hammer Comp provides 2 sacrificial baffles that reduce recoil and ensure maximum service life of your suppressor. Slotted compensating features provide tuned muzzle stability. CNC machined from a solid bar of heat treated 17-4ph stainless steel, the M4SD Hammer Comp is built to last. Compatible with the M4SD series GATE-LOK suppressor interface the Tactical Compensator provides a sacrificial baffle to increase the service life of your silencer. Compatible with QD Blast Shield. Includes shim set and over-travel stop washer. Over-travel stop tab should be positioned at the bottom of the muzzle device (6 O'clock).