PSA AR-15 Misc Lower Receiver Parts Details
Rifle: AR-15, M-16. Replacement pins for trigger and hammer. CNC machined for correct fit. The .1555 diameter pins are designed to tighten up worn receivers or to be installed in new receivers with match trigger sets to remove all free play. These will fit in new receivers without any machine work(.1555 - will not fit Jewell Trigger System).