5.56x45mm NATO Upper Receivers

Patriot Ordnance Factory Minuteman Upper 13.75 5.56 Br Mil-Spec BCG Roller Pin

Patriot Ordnance Factory Pof Upper Minuteman 13.75 5.56 Midlength Keymo Rail

FN FN15 AR-15 Complete Upper Receiver 5.56x45mm NATO 20" Barrel

Rock River Arms Assembled AR-15 A2 Upper Receiver Matte

Noveske AR-15 N4 Infidel Pinned and Welded Complete Upper Receiver 5.56x45mm NATO 13.7" Cold Hammer Forged Barrel NSR-15 M-LOK Handguard Black

Noveske AR-15 N4 Shorty Complete Upper Receiver 5.56x45mm NATO 10.5" Cold Hammer Forged Barrel NSR-9.75 M-LOK Handguard Black

Noveske AR-15 N4 SPR Complete Upper Receiver 5.56x45mm NATO 18" Barrel NSR-15 M-LOK Handguard Black

Aero Precision Standard Upper Receiver Assembled AR-15 Aluminum Kodiak Brown

M4e1 Enhanced 5.56 Nato Assembled Upper Receiver For Ar-15 - M4e1 Enhanced 5.56mm Assembled Upper Receiver For Ar-15 Odg

Aero Precision Complete Upper Receiver M4E1-T RM-15 5.56x45mm NATO 16in Government Mid Length 1 in 7 1/2 x 28 15in A2 Flash Hider Anodized OD Green

Aero Precision Complete Upper Receiver M4E1-T SM-15 5.56x45mm NATO 16in Government Mid Length 1 in 7 1/2 x 28 15in A2 Flash Hider Anodized Kodiak

Aero Precision Upper Receiver Assembled AR-15 M-LOK Handguard Ceracote Burnt Bronze

Aero Precision M4E1 AR15 5.56mm 8in M-LOK Threaded Upper Receiver Pistol Length 1-7 Twist 1/2x28 A2 Flash Hider 7.3in M-LOK R-ONE Handguard Cerakote

Aero Precision M4E1-E AR15 5.56mm 8in M-LOK Upper Receiver Heavy Pistol Length 1-7 Twist 1/2x28 A2 Flash Hider 7.3in EM Handguard Cerakote FDE

Aero Precision Standard Upper Receiver Assembled AR-15 Aluminum Sniper Gray

Aero Precision M4E1 Standard Stripped AR-15 Upper Receiver No Forward Assist Flat Dark Earth

M4e1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4e1 5.56mm Assembled Upper M4 10.5''''bbl Carbine Threaded Fde

Aero Precision M4E1 Threaded Complete Upper 7.5in 5.56 Barrel ATLAS R-ONE 7in M-LOK HG Anodized Black

Aero Precision AR-15 Complete Upper Receiver 5.56 Carbine Length 16 inch Barrel w/Pinned FSB Magpul MOE Handguard A2 Flash Hider Anodized Black

Aero Precision AR-15 Complete Upper Receiver 5.56 Rifle Length 20 inch Barrel w/Pinned FSB Magpul MOE Handguard A2 Flash Hider FDE Cerakote

AMERICAN TACTICAL IMPORTS Milsport Upper 5.56 7.5" MLOK No Handle/BCG

Sr-15 Ks-3 5.56 Nato Assembled Upper Receiver - Sr-15 Ks-3 5.56 Nato 11.5'''' Bbl Assembled Upper Rcvr Black

Sr-15 Ks-1 5.56 Nato Assembled Upper Receiver - Sr-15 Ks-1 5.56 Nato 13.7'''' Bbl Assembled Upper Rcvr Black

Knights Armament Upper Receiver Kit 5.56 NATO 14.5 Barrel M-LOK