5.56x45mm NATO Upper Receivers

Noveske AR-15 N4 Carry Handle OG Upper Receiver Assembly 5.56x45mm NATO 12.5" Barrel NSR-10.75 M-LOK Handguard Black

Noveske Engraved AR-15 Ejection Port Cover 5.56

Aero Precision Standard Upper Receiver Assembled AR-15 Aluminum Olive Drab Green

AERO PRECISION M4E1-T NO FA Stripped Upper

Aero Precision AR-15 M4E1-E Barreled Upper Receiver 5.56x45mm NATO 10.5" Barrel 9.3" ATLAS R-ONE Handguard Black

Ar15 Comp Assembled Upper 5.56 Nato Carbine Barrel W/Pinned Fsb - 5.56 Assembled Upper 16'''' M4 Bbl W/Moe Sl Carb Handguard Blk

Aero Precision AR15 Complete Upper, 16 5.56 Mid-Length Barrel w/ Pinned FSB, MOE Mid-Length, Black

M4e1 Upper Receivers Complete Threaded 5.56mm - M4e1 5.56 Assembled Upper Govt 18'''' Bbl Rifle Threaded Black

Aero Precision M4E1 Standard Stripped AR-15 Upper Receiver Aluminum Flat Dark Earth

Geissele Super Duty AR-15 Pistol Barreled Receiver 5.56x45mm NATO 14.5" Barrel Black

Geissele Super Duty AR-15 Pistol Barreled Receiver 5.56x45mm NATO 10.3" Barrel Black

M4e1 Assembled Upper Receiver 5.56 Mid-Length - M4e1 5.56 Nato Assem Uppr Rcvr M4 14.5'''' Bbl Mid-Length Black

Luth-AR 11.5 Government Profile Complete Upper 5.56 Threaded Barrel Carbine Length

Fortis Billet AR-15 Dust Cover, Carbon Fiber, Gold

Fortis Manufacturing AR-15 Standard Billet Dust Cover Black

CMMG Mk4/AR-15 Upper Receiver Assembly Tungsten 5.56 / .223 Rem 14.5 Barrel

CMMG MK4 Upper Receiver Midnight Bronze 5.56 / .223 Rem 14.5 Barrel

CMMG MK4 Complete Upper Coyote Tan 5.56 / .223 Rem 14.5 Threaded Barrel

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

Next Level Armament NLX Elite 5.56x45mm NATO AR-15 Upper Receiver Stripped Forged Black

Anderson Manufacturing Upper Receiver Stripped with Forward Assist for AR-15

Sons of Liberty Gun Works M4-L89 Upper Receiver Group 5.56 / .223 Rem 14.5 Threaded Barrel

ANDERSON UPPR RCVR ASSMBLY AM15 BLK

Colt Firearms LE6920EPRII PRO Complete Upper 5.56 16.1 Threaded Barrel