M4 14.5 inch Mid Length 5.56 P

Faxon Firearms Mid-Length Button Rifled Gunner Barrel 5.56x45mm 16", Black

Sons Of Liberty Gun Works M4-L89-13.7 M4-L89 5.56mm 30+1 13.70" Black QPQ Button Rifled Barrel, Black Hardcoat Anodize Receiver, Ambidextrous

Geissele Automatics 5.56 CHF Mid-Length Heavy Profile AR-15 Barrel - 14.5" - Open Box

DANIEL DEFENSE 14.5in 5.56mm NATO Mid-Length Lightweight Profile Barrel (07-078-08072-018)

Rock River Arms Mid A4, Semi-automatic, 308NATO, 16 in Barrel, 1:10 Twist, Mid-length, Black Finish, Hogue Grip, 6-Position Stock, 20Rd, RRA 2-Stage Trigger 308A1239

LWRC DI BILLET 5.56MM BLK 16.1" #

Faxon Firearms Mid-Length Button Rifled Pencil Barrel 5.56x45mm 16", Black