AMERICAN TACTICAL IMPORTS Galeo Lower Receiver 5.56x45 Black Parkerized AR15

American Tactical AR-15 Mil-Sport Canada Export Complete Lower ATIGCMS101

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

APF AR-15 Stripped Billet Lower Receiver - Matte Black

Battle Arms Development WH556-URS-ODG Workhorse Upper Receiver Aluminum OD Green Anodized Receiver for AR15/M4

BATTLE ARMS Authority ELite Upper Recv 5.56 10.5" AR-15 Gray

AERO PRECISION M4E1-T 5.56 NATO 11.5" Complete Upper Receiver | Black

ALEXANDER UPPER RECEIVER AR15 - PISTOL 50 BEOWULF 12" TB BLK