6mm arc AR15 built with a new frontier armory billet 6.8 receiver set allowing the use of the new magpul ICAR 6arc 25 round magazines. Not compatible with regular ar mags. Has a 16 inch stag arms barrel under a Hera handgaurd. Aero precision 6.5 / 6mm type 2 bcg. Luther ar stock and pistol grip. The Arken sh4 4-16 ffp mil optic is mounted in a wheeler mount. Willing to sell without optic as well. Will come with 1 Icar mag