2A ARMAMENT Palouse-Lite forged Upper Receiver with Forward Assist for AR15

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

AERO PRECISION M5 308 Win Assembled Upper Receiver | OD Green

AERO PRECISION M5 308 Assembled Upper Receiver | Kodiak Brown Anodized

GUNTEC AR15 STRIPPED BILLET - UPPER RECEIVER BLACK

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

BUSHMASTER M4 Type Patrolman Flat Top A4 Upper 5.56 16" Black

DMA Inc. XTS AR-15 Steel Forward Assist Assembly-QPQ Black