5.56x45mm NATO Upper Receivers

Strike Industries Lightweight Low Profile AR-15, LR-308 Forward Assist Aluminum Black

Geissele USASOC URG-I Near Clone AR-15 Complete Upper Receiver 5.56x45mm NATO 14.5" Pinned Barrel

Daniel Defense DDM4v7 S AR-15 Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel

Daniel Defense DDM4v7 AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Daniel Defense DD4 RIII S AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel Flat Dark Earth

Daniel Defense MK18 RIII AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 10.3" Barrel Flat Dark Earth

Daniel Defense AR-15 M4A1 FSP Block II Complete Upper Receiver 5.56x45mm 14.5" Pinned Surefire SF3P Flash Hider

Faxon Forged Complete AR-15 Upper Receiver Aluminum Black

Daniel Defense M4A1 Block II AR-15 Complete Upper Recevier 5.56x45mm NATO 14.5" Pinned Barrel

Brigade Mk-15 5.56 10.5 Blk Mlok

LBE Upper with Forward Assist and Dust Cover

Wilson Combat Upper Receiver

Daniel Defense MK18 RIII AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 10.3" Barrel Black

Yankee Hill Machine Stripped AR-15 A3 Upper Receiver Aluminum Black

Wilson Combat AR Style Billet Upper Receiver 5.56 NATO

Daniel Defense DDM4v7 Pro AR-15 Complete Upper Receiver 5.56x45mm NATO 18" Barrel

Daniel Defense DDM4v7 Lightweight AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 16" Cold Hammer Forged Barrel M-LOK Black

FightLite Industries MCR556DFRM Dual Feed Complete Upper Receiver 5.56x45mm 16.25" Barrel M-LOK Handguard

Noveske AR-15 Chainsaw Complete Upper Receiver 5.56x45mm NATO 16" Barrel NSR-15 M-LOK Handguard Black

Spikes Tactical ST-15 Enhanced Mid-Length Complete Upper 5.56 / .223 Rem 16-inch CHF

Daniel Defense MK12 SPR AR-15 Complete Upper Receiver 5.56x45mm NATO 18" Barrel

CMMG Resolute MK4 5.56 16.1 Barrel No BCG/Charging Handle

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 16" Cold Hammer Forged Barrel M-LOK DDC