5.56x45mm NATO Upper Receivers & Conversion Kits

Luth-AR A2 Upper Receiver 5.56 / .223 Rem

Luth-Ar Slick Side A1 5.56 NATO Ar-15 Upper Assembled Receiver Anodized

Luth-ar UR-01-E3-S A1 Stripped Upper Receiver 223/5.56mm Aluminum Black Hardcoat Anodize Receiver

Battle Arms Workhorse AR-15 Complete Upper Receiver 223 Remington (Wylde) 16" Barrel

Black Rain Ordnance Milled Upper Receiver Gen 2 Black

Broadsword Billet Upper Receiver - Broadsword-89 Billet Stripped Upper Receiver Black

Noveske N4 Afghan Complete Upper 5.56 14.5 P&W Barrel

Luth-Ar M16 A1 5.56 NATO AR-15 Assembled Upper Receiver

Luth-Ar M16 A1 Stripped Upper Receiver AR-15 5.56 NATO

Battle Arms Development WORKHORSE Complete Upper 5.56 16 Barrel 15 M-LOK Handguard

Ar-15 Stripped Upper Receiver - 5.56x45 Nato Stripped Upper Receiver For Ar-15 Black

Sons of Liberty Gun Works M4-L89 Upper Receiver Group Complete Upper 5.56 16 Barrel 15 L89 Handguard

SONS OF LIBERTY GUN WORKS M4-L89 Upper Recvr 5.56 14.5" MidGas P/W Plan B FH

Noveske N4 Chainsaw Stripped Upper Receiver AR-15 Black

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

Colt Firearms LE6920EPRII PRO Complete Upper 5.56 16.1 Threaded Barrel

Noveske N4 Carry Handle Stripped Upper Receiver Black

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

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Nickel

Luth-AR A1 C7 Retro Complete AR-15 Upper Receiver - 5.56 - 20"

Luth-AR A1 Slick Side Retro Complete AR-15 Upper Receiver - 5.56 - 20"

Colt Assembled AR-15 Upper Receiver Aluminum Black