M1 Garand (Also fits M14/M1A).  Trigger, late without tooling whole, used, USGI, most parked.  (Note:  This trigger also fits the M14 type trigger housings.  The M14 type hammer has a slightly larger disconnector used for selective fire, since almost everyone doesn't have this option a Garand trigger will work fine.  ***M14 Triggers will fit into a M1 Garand trigger housing they will not fit into an M1 Garand stock.***)