ROCK RIVER ARMS Complete Lower Receiver 2STG T

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

Timber Creek Greyman AR-15 Lower Parts Build Kit, Desert - G LPK D

Timber Creek Greyman Complete AR-15 Build Kit Black - G LPK BL

Timber Creek Outdoors AR15 Lower Parts Kit - Tungsten

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

Timber Creek Outdoors AR15 Lower Parts Kit - Burnt Bronze

AERO PRECISION M4E1 Stripped Lower Receiver | Kodiak Brown Anodized