CMMG Dissent Mk4 300BLK 10.5in Armor Black Upper Group (30BC239-AB)

LUTH-AR Complete 16in Lightweight AR Rifle Kit with Adjustable Stock (RKL-163)

LUTH-AR A1 Upper Receiver 223/5.56mm Aluminum Black Hardcoat Anodize Receiver (UR-01-E3-SA)

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

Luth-AR A3 Upper Receiver Parts Kit URPK-A3

MIDWEST INDUSTRIES Fits AR-15 .223 Wylde 16in MI-CRM14 M-LOK Handguard Black Upper (MI-N16CRM14-U)

Midwest Industries Upper, 223 Wylde, 16" Lightweight Barrel, Black, 15" MLOK Handguard, Fits AR15, No BCG or Charging Handle MI-N16CRM15-U

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