5.56x45mm NATO Rifle Parts

LWRCI DI Bolt Carrier Group 5.56 Nickel

ODIN Works .223/5.56 Barrel Nut Black

Del-ton Delton Assembled Ar-15 Upper With M4 Feed Ramps

POF USA P415 Edge Upper Receiver Assembly 5.56x45mm NATO 34 in Length 16.5 in Barrel 5 Position Adjustable M-Lok Edge Triple Port Muzzle Break Olive

POF USA Minuteman Upper Receiver 5.56 10.5in Barrel Carbine Length 1-8 Twist 1/2x28 9in Renegade Rail 3-prong Flash Hider Tungsten

POF USA Minuteman Upper Receiver 5.56 16.5in Barrel Mid Length 1-8 Twist 1/2x28 14.5in Renegade Rail 3-prong Flash Hider Tungsten

POF USA Renegade Plus Upper Receiver Assembly 5.56mm 16.5in Barrel M-LOK Rail Burnt Bronze

Ar-15 Hammer Forged M4 Barrels - Ar-15 Hf M4 Barrel 14.7 Carbine 5.56mm

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 10.5 Inch Barrel 1-7 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hide Black

Rock River Arms 14.5in R4 CL 1-7 Full Auto Barrel Black

Rock River Arms 16in R4 CM LTWT Barrel Assembly Black

Rock River Arms 16in R4 CM LTWT Barrel Black

Rock River Arms A2 National Match Upper Receiver Assembly with National Match 1/4x1/4 .030 Hooded Aperture Rear Sight Black

Rock River Arms A2 National Match Upper Receiver Assembly with National Match 1/4x1/4 .040 Hooded Aperture Rear Sight Black

Rock River Arms A2 National Match Upper Receiver Assembly with National Match 1/2x1/2 .030 Hooded Aperture Rear Sight Black

Rock River Arms Completed Pistol Upper Receiver Mountain .223/5.56mm 10.5 Inch Barrel 1-9 Twist 1/2-28 Threat A2 Flash Hider Black

Rock River Arms 10.5in CL 1-7 Full Auto Barrel Assembly Black

Rock River Arms 16in Car CL LTWT Barrel Assembly Black

Rock River Arms 16in Car CL LTWT Barrel Black

Rock River Arms 16in R4 1-9 CL LTWT Barrel Assembly Black

Rock River Arms 16in R4 1-9 CL LTWT Barrel Black

Rock River Arms 16in Mid LTWT CL Barrel Black

Rock River Arms 7in Pistol CM Barrel Assembly w/A2 Front Sight Black

Rock River Arms 7in Pistol CM Barrel Black