5.56x45mm NATO Receivers

Mk16 Super Duty Complete Upper Receivers 5.56mm - Mk16 11.5'''' Super Duty Upper Chf Bbl, Ach, Nano Fh/Bcg Odg

Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 14.5'''' Top Tier Stripped Super Duty Upper Od Green

Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 11.5'''' Top Tier Stripped Super Duty Upper Od Green

Ar-15 Super Duty Stripped Upper Receivers 5.56mm - Ar-15 14.5 Super Duty Stripped Upper Receiver Ddc

Ascent 5.56x45 Nato Complete Upper Receiver For Ar-15 - Ascent 5.56x45 Nato 10.5'''' Complete Upper Receiver Black

Ascent 5.56x45 Nato Complete Upper Receiver For Ar-15 - Ascent 5.56x45 Nato 16'''' Complete Upper Receiver Black

Ar-15 Upper Receiver Assembled No Auto Sear Cut - 5.56mm Assembled Upper Rcvr No Auto Sear Cut For Ar-15 Black

5.56 Mid-Length Elw Complete Upper Receiver W/Mod3 Comp For Ar15 - 5.56mm 14.5'''' Mid-Length Elw Compl Upper W/Mod 3 Comp

5.56mm Mid-Length Complete Upper Receiver W/Mod3 Comp For Ar15 - 5.56mm 14.5'''' Mid-Length Compl Upper Rcvr W/Mod 3 Comp

5.56mm Carbine Complete Upper Receiver W/A2 Flash Hider For Ar15 - 5.56mm 11.5'''' Carbine Completeupper Rcvr W/A2 Flash Hider

Ar-15 14.5'''' M4 Government Upper Receiver 1-9 - Ar-15 14.5'''' M4 Upper Receiver 1-9

Ar-15 A3 Upper Receiver Assembly 5.56mm Left Hand

K-Spec 5.56x45mm Nato Complete Upper Receiver - K-Spec 5.56 Nato 14.5'''' Bbl 1-7 Twist Complete Upper Black

K-Spec 5.56x45mm Nato Complete Upper Receiver - K-Spec 5.56 Nato 13.9'''' Bbl 1-7 Twist Complete Upper Black

Resolute(R) Mk4 5.56 Nato Assembled Upper Receiver W/P&W Brake - Resolute Mk4 5.56nato Assembl Upper 14.5''''bbl W/P&W Brake Blk

Dirty Bird AR-15 Forged Multi-Cal Receiver Set + SRMS Handguard - FDE, 13.5"

Stag 15 5.56 M4 Upper Receivers - Stag 15l Left Hand M4 Phosphate Upper

Stag 15 5.56 7.5in Tactical Nitride Upper Receivers - Stag 15l Left Hand Tactical 7.5'''' Nitride Upper

Stag 15 5.56 7.5in Tactical Nitride Upper Receivers - Stag 15 Tactical 7.5'''' Nitride Upper

Stag 15 5.56 10.5in Tactical Nitride Upper Receivers - Stag 15l Left Hand Tactical 10.5'''' Nitride Upper

Stag 15 5.56 10.5in Tactical Nitride Upper Receivers - Stag 15 Tactical 10.5'''' Nitride Upper

Stag 15 5.56 16in Tactical Nitride Upper Receivers - Stag 15 Tactical Nitride Upper

East India 5.56x45 Assembled Upper Receiver Starter Kit For Ar15 - East India 5.56x45 Assembled Upper Medium 13.7'''' Bbl W/Rail

M4-89 5.56x45 Nato Assembled Upper Receiver - M4-89 5.56x45 Nato 12.5'''' Bbl 11.5'''' M89 Rail W/A2 Flash Hider