ODIN WORKS OTR-15 Lower/Upper Set 223 Rem/ 5.56 NATO Tan

Timber Creek Outdoors AR Lower Parts Kit for AR-15, Robin's Egg Blue - AR LPK RE

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

Next Level Armament - AR15 Lower Parts Kit - Mil-Spec - NLX662

AERO PRECISION M5 308 Win Assembled Upper Receiver | OD Green

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