Mars Trigger PC9 FRT

The Mars Trigger PC9 FRT is a forced reset trigger for the Ruger PC Carbine and PC Charger. It uses the motion of the reciprocating bolt to mechanically reset the trigger after each shot while still requiring one trigger pull per round, which keeps it outside the federal machine gun definition. The assembly drops into the factory OEM 9mm trigger housing, so there are no proprietary lowers or housings to source.

Mars builds it from 4140 chromoly alloy steel for wear resistance under the higher cyclic stress an FRT places on a trigger group. Reset tension is adjustable, which lets you tune the trigger to the ammunition and recoil impulse of your specific gun, and matters on a direct-blowback 9mm carbine where bolt velocity varies between loads.

Installation is a drop-in swap done with a punch; no gunsmithing and no permanent modification. Reverting to the factory trigger is the same swap in reverse. Mars lists the PC9 FRT as 9mm only and built around the OEM Ruger trigger housing, so confirm your gun uses the standard housing before ordering, and verify forced reset triggers are legal in your state before buying.