APF Armory AR15 Multi-Caliber Stripped Lower Receiver w/ Side Folder - Black

Wraithworks Billet Slick Side AR-15 Upper Receiver - Black | No Forward Assist or Brass Deflector

White Label Armory Forged Stripped AR-15 Lower Receiver

GUNTEC AR15 STRIPPED BILLET - UPPER RECEIVER BLACK

AERO PRECISION M4E1 Stripped Lower Receiver | Kodiak Brown Anodized

APF AR-15 Stripped Billet Lower Receiver - Matte Black

ALEXANDER UPPER RECEIVER AR15 - PISTOL 50 BEOWULF 12" TB BLK

AERO PRECISION M4E1 Complete AR15 Lower Receiver w/ A2 Grip & M4 Stock - Black