MK 18 5.56 for sale. Built for hard use. Aero precision upper, lower, and 10.5" barrel (1/7 twist), smith enterprises vortex flash hider, Giesslle super duty receiver extension, magpul SL-M, Smith bros mils spec trigger, kns anti walk trigger pins, G&R tactical HD lower parts kit, midwest industries 10" combat rail, kac front and rear sight, somogear NGAL green/infrared laser, streamlight protac flashlight with cloud defensive pressure switch/ mount, holosun 403 gold dot on a unity tactical 2.06 (heads up) mount, magpul BAD lever, reptilia grip, strike industries foregrip, magpul MS3 sling. Magpul extended mag release, nickel boron bolt carrier group with titanium firing pin. Pics on request.