5.56x45mm NATO Upper Receivers

BATTLE ARMS Authority ELite Upper Recv 5.56 10.5" AR-15 Gray

BATTLE ARMS Authority ELite Upper Recv 5.56 10.5" AR-15 Black

Wilson Combat AR15/M16 Lightweight Billet Upper Receiver Anodized

Sons of Liberty Gun Works M4-89 5.56 AR-15 Partial Upper Receiver Group - 11.5"

East India 5.56x45 Assembled Upper Receiver Starter Kit For Ar15 - East India 5.56x45 Assembled Upper Medium 11.5'''' Bbl W/Rail

LEAD & STEEL Just As Good Upper 5.56mm 16" Gray

LEAD & STEEL ARC Mil-Spec Stripped Upper FDE

LEAD & STEEL ARC Mil-Spec Stripped Upper ODG

LEAD & STEEL Just As Good Upper 5.56mm 16" FDE

LEAD & STEEL All-Rounder Carbine Upper Receiver 5.56 14.5" FDE

LEAD & STEEL All-Rounder Carbine Upper Receiver 5.56 14.5" ODG

AR-STONER AR-15 A3 Extreme Duty Upper Receiver Assembled Aluminum Black

Black Rain Ordnance Rain Ordnance Rain Ejection Port Cover

SOLGW SWAMP FOX UL 14.7" 5.56 URG

Sons of Liberty Gun Works SOLGW M4-L89 Broadsword 5.56mm 13.7" No BCG/CH Upper Receiver w/HUXWRX Mount M4L89BSUPPER-13.7-556-XL

Sons of Liberty Gun Works SOLGW M4-L89 Broadsword 5.56mm 13.7" No BCG/CH Upper Receiver w/SF Compatible/ROTEX Mount M4L89BSUPPER-13.7-556-SF

ANDERSON Stripped Upper Receiver Black

AR-STONER AR-15 Pistol Kit 5" Barrel 5.56x45mm NATO Short Buffer System

Sons of Liberty Gun Works East India Starter Kit Upper 5.56 13.7 Threaded Barrel

Sons of Liberty Gun Works M4-EXO3 5.56mm 16" Bbl Mid Gas EXO3 Rail A2FH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-16-A2

Sons of Liberty Gun Works M4-EXO3 5.56mm 14.5" Bbl Mid Gas EXO3 Rail P&W Plan BFH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-145-PB

Sons of Liberty Gun Works M4-EXO3 5.56mm 14.5" Bbl Mid Gas EXO3 Rail P&W ASRFH Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-145-ASR

Sons of Liberty Gun Works M4-EXO3 5.56mm 14.5" Bbl Mid Gas EXO3 Rail P&W HUXWRX Mt Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-145-HUX

Sons of Liberty Gun Works M4-EXO3 5.56mm 14.5" Bbl Mid Gas EXO3 Rail No Muzzle Dev Liberty Fighting Bbl & Mil-Spec Upper Receiver U-M4EXO3-556-145-NMD