I built this upper with all new parts minus the RIS II which I purchased used from a member here. I test fired 2 mags though to ensure function.
I am a certified LE AR15 armorer. Everything was installed to spec. Barrel was correctly dimpled for MK12 Gas block.
I have been building clone guns for several years and the MK18 Mod 1 is my favorite. Buy this before I change my mind.
New Colt Upper New Colt C marked carrier w/ MPC Bolt New Colt Gas Tube New Colt 10.3" Cage code barrel New DD MK12 Gas Block New SureFire 4 Prong hider New PRI Gas Buster charging handle Used Daniel Defense MK18 RIS II FDE
I ship fast and fully insured! Check my feedback and buy with confidence. Price is firm. Only trade consideration would be L3 NGAL A1 Most electronic payments accepted USPS MO also accepted