The TPS USMC Armory Replacement Hex Nut is fully compatible with USMC deployment kit. It works with military issued wrench. Simply remove existing 7/16 hex nuts from original equipment and replace with 1/2 hex nuts. It is compatible for the entire line of the TSR, TSR "W" and HRT scope rings in both the aluminum alloy and alloy steel versions. 1/4-28 threads.