The Cloak Industries H3 carbine buffer helps to eliminate some of the cycling issues your rifle may face. Properly buffering your AR-15 is a key component of reliable Assisted Reset Trigger operation. If a heavier buffer is necessary for reliable operation of your rifle, consider the Cloak AR-15 H3 Buffer. For use on AR-15 platforms. Compatible with The Triggered Company Disrupter Assisted Reset Trigger and MFR56 Upper Receiver.