Evolve Weapon Systems AR-15 Lower Receiver - Stripped Lower - Green

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

GUNTEC AR15 SLABSIDE STRIPPED BILLET UPPER RECEIVER 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

Timber Creek Outdoors Greyman AR15 Lower Parts Kit - Stealth

LBE Unlimited M4 Stripped Upper Receiver, Fits AR15, Black Finish ARSTUP

Timber Creek AR-15 Lower Parts Kit, OD Green - AR LPK OD