Daniel Defense MK18 RIII, Semi-automatic, Short Barrel Rife, 223 Remington/556NATO, 10.3 Cold Hammer Forged Barrel, Anodized Finish, Black, Daniel Defense Grip, Flat Dark Earth Daniel Defense 9.5 RIS III M-LOK Rail, Daniel Defense Stock, Manual Safety, Ambidextrous Lower, 32 Rounds, 1 Daniel Defense Magazine 02-088-00319-047 LESS WEIGHT, MORE FLEXIBILITY-with additional features that make this unmatched short-barreled rifle even lighter, more maneuverable, and more controllable. The MK18 RIII features a fully ambidextrous lower receiver, and Daniel Defense replaced the RIS II rail system with a lighter-weight RIS III rail system that utilizes M-LOK attachment instead of picatinny. Class III dealers only, all NFA rules apply.