Daniel Defense 2300408013011 MK18 Upper Group 5.56x45mm NATO 10.30" Black Phosphate Barrel, 7075-T6 Aluminum Black Anodized Receiver, Flat Dark Earth DD RISII MK18 Handguard for AR-15

Daniel Defense

Gemtech 13833 GVAC Upper Receiver 5.56x45mm NATO 16.10", Black, 15" M-LOK Handguard, ETM Flash Hider, BCG Included

Gemtech

AERO M4E1 STRIPPED LOWER RECEIVER BLK

Aero Precision

Patriot Ordnance Factory Renegade + Complete Upper 5.56x45mm NATO 10.50" Black Nitride Barrel Aluminum Black Anodized Receiver 9" M-LOK Handguard Adjustable Block

Patriot Ordnance Factory

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

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

AERO M5 AR10 ASSEMBLED UPPER KDK BRN

Aero Precision

Faxon Firearms URSSB762P ARAK-21 Complete Upper 7.62x39mm Black

Faxon Firearms

RADN R0473 COMPL UPPER 16 223W FDE

Radian Weapons