5.56x45mm NATO Upper Receivers

AERO PRECISION M4E1 Complete Upper 16" 5.56 Mid-Length - Black

AERO PRECISION AR15 Assembled Upper Receiver (No Forward Assist) | Anodized Black

VKTR VK-1, 5.56mm, 13.7 P&W Barrel w/ HUXWRX Flash Hider XL QD, Black, Complete Upper Receiver

LaRue Tactical Stealth 2.0 AR-15 Upper Receiver Handguard Combo 10.5"

LaRue Tactical Match Grade AR-15 Complete Upper Receiver 5.56x45 NATO 16.1" Barrel

Shaw Barrels AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel 12" Handguard

Geissele Automatics Geissele Super Duty 5.56mm 14.5" Heavy Bbl (.750 Journal) Black Stripped Upper Receiver (No Charging Handle, Muzzle Device, or

Battle Arms Development Authority Elite Complete Upper 5.56 10.5 Threaded Barrel M-LOK Handguard

Sons of Liberty Gun Works East India 5.56mm NATO 16'' Upper Receiver

Anderson Manufacturing AM-15 Upper Receiver Assembled with Charging Handle

Sons of Liberty Gun Works Broadsword 89 V2 Complete Upper 5.56 14.5 Threaded Barrel

Sons of Liberty Gun Works East India Starter Kit 5.56 14.5 Threaded Barrel for AR-15

Sons of Liberty Gun Works AR-15 L89 Complete Upper Receiver 5.56x45mm 11.5" Barrel 10.75" L89 M-LOK Rail

M4-L89 5.56x45 Nato Assembled Upper Receiver - M4-L89 5.56x45 Nato 13.7''''bbl 13.75'''' L89 Rail W/Huxwrx Xl

HM Defense 16" 5.56 Monobloc M-LOK Midlength Complete Upper w/ 15" M-LOK Handguard

Cobalt Kinetics CK-Pro Urg Complete Upper Flat Dark Earth 5.56 / .223 Rem 11.5 Barrel

DPMS M4 Complete Upper 5.56 16 Barrel w/ Quad Rail

DPMS AR-15 Complete Upper 5.56 10.5 Barrel

DPMS AR-15 Complete Upper 5.56 16 Barrel

FightLite Industries DFX Complete Upper 5.56 / .223 Rem 12.5 Threaded Barrel w/ 100 M27 Links

FightLite Raptor Belt-Fed AR-15 5.56x45mm NATO 16.25inch Upper Receiver M-LOK Rail 1-7 Twist 1/2x28 Anodized Black

Fortis Billet Dust Cover - Carbon Fiber - Blue

Patriot Ordnance Factory Pof Upper Complete Wonder 13.75 5.56 Blue

Patriot Ordnance Factory Renegade Plus 13.75 Upper 5.56 Direct Impingement