RUGER AR-556 Elite 5.56 NATO Complete AR15 Lower Receiver - Black w/ Magpul MOE SL Stock

White Label Armory WLA-LOW-1015-01 Lower Parts Kit For AR-15 Black

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

TacFire AR-15 .45 ACP Unassembled Pistol Kit w/ Lower Parts Kit - 7.5"

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 Authority ELite Upper Recv 5.56 10.5" AR-15 Gray

BUSHMASTER BFSIII 5.56 NATO Lower Receiver