AR Parts in 5.56x45mm NATO

APF Armory AR-15 5.56 Nato Threaded Barrel 10.5in 1-7 Twist 1/2x28 Black

APF Armory AR-15 5.56 Nato Threaded Barrel 16in 1-7 Twist 1/2x28 Black

Christensen Arms .5-28 CA-15G2 Black Nitride Three Prong Flash Hider 810-00045-01

Cobalt Kinetics BAMF Professional Series 556 Nato AR Pistol CK-PRO-75-BLK

ANDERSON AR15 S 5.56 NATO Complete Upper Receiver w/ Bolt Carrier Group & Charging Handle - Black

BLACK RAIN ORDNANCE Spec15 Forged Alum Upper Recv 16" 4150 Gas Barrel

Maxim Defense Industries MDX 505 PDX/SCW Compatible URG Upper Receiver 5.56 NATO Hate Brake 1/2-28 Thread 5.5in Barrel Arid Earth

V Seven Competition Muzzle Brake 5.56 mm 1/2x28 Raw TI MBCOMP 556

V Seven Titanium A2 Style Comp 5.56 Raw Titanium

Sons of Liberty Gun Works SOLGW East India 5.56mm 12.5" Carbine Gas Starter Kit EIC-12.5-556

LMT Defense MRP 12.5 5.56mm Mid-Length Gas Barrel

Anderson Manufacturing AM-15 Utility 5.56mm Complete Upper Receiver with 14.5 Inch Barrel

ANDERSON BARREL 5.56 NATO 10.5 IN BBL 1:7 TWIST CARBINE GOVT PROFILE

ANDERSON BARREL 5.56 NATO 7.5 IN 1:7 TWIST PISTOL GOVT PROFILE

ANDERSON Utility Builder's Kit 16" 5.56 NATO

Anderson Manufacturing Utility 5.56mm Complete AR-15 Upper Receiver with 7.5 Inch Barrel

Sons of Liberty Gun Works SOLGW M4-L89 Broadsword 5.56mm 14.5" No Muzzle Device No BCG/CH Upper Receiver M4L89BSUPPER-14.5-556-NMD

Sons of Liberty Gun Works SOLGW M4-L89 5.56mm 12.5"Bbl Broadsword Upper SBR M4-L89BS-SBR-12.5

Sons of Liberty Gun Works SOLGW M4-L89 5.56mm 11.5"Bbl Broadsword Upper SBR M4-L89BS-SBR-11.5

Sons of Liberty Gun Works SOLGW M4-L89 5.56mm 16"Bbl Broadsword Upper Rifle M4-L89BS-16

Sons of Liberty Gun Works SOLGW M4-L89 5.56mm 12.5"Bbl Broadsword Upper Pistol M4-L89BS-PISTOL-12.5

Sons of Liberty Gun Works SOLGW M4-L89 5.56mm 11.5"Bbl Broadsword Upper Pistol M4-L89BS-PISTOL-11.5

Sons of Liberty Gun Works SOLGW Patrol SL 5.56mm 13.9" No BCG/CH Upper Half w/SF Compatible/ROTEX Mount PATROLSLUPPER-13.9-556-SF

Sons of Liberty Gun Works SOLGW Patrol SL 5.56mm 11.5" No BCG/CH Upper Half w/HUXWRX Mount PATROLSLUPPER-13.9-556-XL