RUGER AR Upper Receiver Assembly (91003)

RUGER AR Stripped Upper Receiver (91004)

LUTH-AR A1 Stripped Upper Receiver 223/5.56mm Aluminum Black Hardcoat Anodize Receiver For M16 (UR-01-M16)

YANKEE HILL MACHINE A3 Upper Receiver (YHM-100)

SPIKE'S AR15 Forged Upper (SFT50M4)

Spike's Tactical Flat Top Upper w/Ejection Port Door, 9MM, Black Finish SFT902D

YANKEE HILL MACHINE Stripped A3 Anodized Upper Receiver (YHM-110)

Nordic Components NC15 Extruded Stripped Upper, Fits AR15, Blk Finish, Upper Receiver Eliminates Dust Cover/Forward Assist, Compatible with Milspec BCGs/Charging Handles/Barrels/Most Handguards, Flat Top Picatinny Rail, 7029-T6 Alm, 10oz NC15-UR-EXT