5.56x45mm NATO Rifle Parts

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tactical Grape

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Tactical Grape

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Blue Titanium

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Burnt Bronze

Ghost Firearms Vital Upper Receiver 5.56x45 NATO 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 7 inch M-LOK Free Float Hand Guard A2 Birdcage Flash

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 7 inch M-LOK Free Float Hand Guard A2 Flash

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 10.5 inch Carbine Length 4150 M4 Barrel 1-7 Twist 9 inch M-LOK Free Float Hand Guard A2

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 10.5 inch Carbine Length 4150 M4 Barrel 1-7 Twist 9 inch M-LOK Free Float Hand Guard A2

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 16in Carbine 4150 M4 Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Birdcage Muzzle

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 14 inch M-LOK Free Float Hand Guard A2

Guntec USA AR-15 Stripped Billet Upper Receiver w/9in Ultralight Series M-Lok Handguard Flat Dark Earth

Guntec USA AR-15 Stripped Billet Upper Receiver w/10in Ultralight Series M-Lok Handguard Flat Dark Earth

WMD Guns Upper Assembly Billet AR-15 MLOK HG 15in NiB-X Nickel

WMD Guns AR-15 5.56x45mm NATO 16in M-LOK Upper Receiver Compensator NiB-X Nickel Silver

Desert Tech MDRX Conversion Kit MDR-CK-B1130-SE-B, Side Eject, 5.56 NATO, 11.5 in Threaded Barrel, Black

Gau-5a Complete Upper Receiver & 4x Retro Carry Handle Scope - Brn Gau-5a 5.56mm 12.7'''' Bbl 1-12 Twist W/Colt 4x21mm Scope

Gau-5a Complete Upper Receiver & 4x Retro Carry Handle Scope - Brn Gau-5a 5.56mm 12.7''''bbl 1-12 Twist Pin/Weld W/Colt 4x21mm

Xm177e2 11.5''''Adeg W/Colt Optic - Brn Xm177e2 5.56mm 11.5'''' Bbl 1-7 Twt Upper Pin/Weld W/4x21mm

M16a1 20'''' Rifle Length Upper W/Colt Ar-15 4x21mm - Brn-16a1 5.56x45 Nato 20'''' Bbl 1-7 Twist Upper W/Colt 4x21mm

Dd 14.5'''' M4a1 Riii Upper Receiver W/ Eotech Optics - Dd 14.5'''' M4a1 Riii Upper W/ Exps3-0 Holographic Red Dot

Dd 14.5'''' M4a1 Riii Upper Receiver W/ Eotech Optics - Dd 14.5'''' M4a1 Riii Upper W/ Exps2-0 Holographic Red Dot

Dd 14.5'''' M4a1 Fsp Upper Receiver W/ Eotech Optics - Dd 14.5'''' M4a1 Fsp Upper W/ Exps3-0 Holographic Red Dot

Dd 14.5'''' M4a1 Fsp Upper Receiver W/ Eotech Optics - Dd 14.5'''' M4a1 Fsp Upper W/ Exps2-0 Holographic Red Dot

Dd 14.5'''' M4a1 Somcom Upper Receiver W/ Eotech Optic - Dd 14.5'''' M4a1 Socom Upper W/ Exps3-0 Holographic Red Dot