5.56x45mm NATO Upper Receivers

Q Sugar Weasel Complete Upper 5.56 13 Barrel

FN FN15 AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Noveske N4 Chainsaw Stripped Upper Receiver AR-15 Black

Noveske N4 Recon AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel Black

AERO PRECISION AR15 5.56 NATO / 223 Rem 10.5" Complete Upper Receiver w/ Magpul MOA Handguard | FDE

Aero Precision AR-15 Barreled Upper Receiver 5.56x45mm NATO 16" Barrel MOE SL Mid-Length Handguard Black

AERO PRECISION M4E1-T 5.56 NATO / 223 Rem 14.5" ATLAS R-ONE Complete Upper | FDE

Aero Precision AR-15 M4E1 Barreled Upper Receiver 5.56x45mm NATO 16" Barrel Atlas S-One M-LOK Handguard Black

Geissele Super Duty AR-15 Pistol Barreled Receiver 5.56x45mm NATO 11.5" Barrel Black

Geissele Automatics Super Duty Stripped Upper - DDC Desert Dirt 5.56 10.3 Barrel

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

LUTH-AR BA-F14-7C 14.5SOCOM BRL ASSY FSB CHRM

JE Machine Ultralight Minimalists Full Top Rail AR-15 M-LOK Handguard 4"

JE Machine Ultralight Minimalists Full Top Rail AR-15 M-LOK Handguard 12"

San Tan Tactical AR-15 Everything but the Lower Kit 5.56x45mm NATO 10.5" Barrel

LaRue Tactical M4 Stealth 1.0 Upper Receiver Stripped Aluminum Black

Fortis Manufacturing Billet Dust Cover Gray for AR-15

CMMG Resolute Mk4 AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Battle Arms Development Workhorse Upper Receiver OD Green for AR15/M4

GunTec AR-15 Slabside Billet Upper Receiver 5.56

Sons of Liberty Gun Works East India Starter Kit Complete Upper 5.56 16 Threaded Barrel Rifle Length

SONS OF LIBERTY GUN WORKS M4-L89 Upper Recvr 5.56 14.5" MidGas P&W HUXWRX

Cloak Industries MFR 56 Belt Fed Complete Upper Receiver 5.56x45mm NATO Black

Fortis Billet Carbon Fiber AR-15 Dust Cover Black