AR-STONER Knurled AR-15 Ejection Port Cover Pin

The AR-STONER Ejection Port Cover Pin is the answer we have all been waiting for. Have you ever lost the hinge pin snap ring or C-clip when assembling your AR-15 upper receiver? AR-STONER has you covered with the Ejection Port Cover Knurled Pin. The knurling on the end of the pin keeps the pin from sliding to far to the rear, and the handguard blocks it from sliding forward. No Ejection Port Cover Hinge Pin Snap Ring required! Note: Intended for forged, mil-spec and similar A3 uppers only, will not fit a billet upper receiver and may not work with upper receivers that vary from the mil-spec design.