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AR-9mm Upper Receivers
Our SAA AR-9mm PCC/PDW complete uppers work with both/either Glock and/or Colt-SMG stick mag lowers like the Aero EPC-9 lowers (Glock mag) we also sell, or those from Spikes (Glock & Colt-SMG), Angstadt, Circle-10, CMMG etc.
All SAA AR-9 9mm Complete Uppers are standard blowback function & are confirmed head spacing & test fired before shipping out. We build them all to order.