KE-9 BILLET COMPLETE LOWER RECEIVER W/ TRIGGER & MAG CATCH

Battle Arms AR9 AR-15 Stripped Lower Receiver Black

Franklin Armory Libertas Billet Lower Receiver with Binary Trigger

Angstadt Arms 0940 Lower Receiver AR-15 Platform 9mm

Battle Arms AR-15 Ambidextrous Receiver Set Anodized Black

BCM AR-15 Complete Lower Receiver Anodized Black Pistol Receiver Extension

Bootleg Lower 5.56x45mm AR Lower, Black - BPLR1 - BPLR1

Aero Precision M4E1 AR-15 Complete Lower Receiver Anodized Black with A2 Grip