Spikes STU5025M4S Complete Upper 5.56x45mm NATO 16" Black Phosphate Barrel, 7075-T6 Aluminum Black Receiver, M4 Double Head Shield Handguard for M4 Carbine

Spikes

Faxon Firearms URSSB556 ARAK-21 Complete Upper 5.56 Black

Faxon Firearms

MODEL 1 UPPER 223WYL 16" BLK223 Wylde

Radian Weapons

BRAVO ZULU 450BM 16" UPPER450 Bushmaster

Bushmaster

AM AR15 LOWER RECEIVER COMPLETE MAGPUL BLK

ANDERSON MANUFACTURING

Spikes STU5035S2S Complete Upper 5.56x45mm NATO 16" Black Phosphate/Midlength Barrel, 7075-T6 Aluminum Black Receiver, 12" SAR3 Free-Floating Handguard for AR-15

Spikes

HM Defense 125MBUP556 MonoBloc Upper 223 Rem, 5.56x45mm NATO 12.50" Black Cerakote Barrel, 7075-T6 Aluminum Black Anodized Receiver, 10.37" M-LOK Free-Float Handguard for AR-15 Pistol

LUXUS ARMS (HM DEFENSE)

AERO M5 AR10 ASSEMBLED UPPER KDK BRN

Aero Precision

Battle Arms Development BAD-PCC-UR Xiphos Upper Receiver 9mm Aluminum Black Hardcoat Anodize Receiver

Battle Arms Development

Faxon Firearms URSSB762P ARAK-21 Complete Upper 7.62x39mm Black

Faxon Firearms

AM AR15 LOWER RECEIVER STRIPPED

ANDERSON MANUFACTURING

RADN R0473 COMPL UPPER 16 223W FDE

Radian Weapons