Hodge Defense Mod 1 AR-15 Receiver Set - Clear Anodize

Battle Arms Development WH556-URS-ODG Workhorse Upper Receiver Aluminum OD Green Anodized Receiver for AR15/M4

Aero Precision AR-15 Stripped Upper Receiver - Slick Side - Black

Aero Precision AR-15 Mil-Spec Carbine Receiver Extension - Black Anodize - Open Box

Aero Precision AR15 Stripped LH Upper Receiver - FDE - BLEM

Aero Precision M5 AR-308 Stripped Upper Receiver - FDE Cerakote

Aero Precision Stripped AR-15 Upper Receiver - Open Box

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