Lantac LA-SF15 Anodized Black Semi Automatic MSR - 6mm ARC - Lantac has been working closely with Hornady Manufacturing, undertaking testing and development of products that utilize the new 6MM ARC ammunition in a variety of bullet weights. Lantac was one of the first companies to become involved with this new caliber as part of a funded military research project and has conducted extensive evaluation and development work in that time. 7075-T6 Alloy Forged Receiver Set, Hardcoat Anodized (Type3, Class2) to MIL-A-8625 standards. SPADA-ML 15in Handguard Proof research 18in Rifle Steel Barrel with 1: 7.5 Twist and Target Crown. Lantac dedicated 6mmARC E-BCG Lantac DGN762B Dragon Muzzle Brake Magpul MOE Grip and Luth-AR MBA-3 17rd Elander Magazine. The ammunition will not function with current PMAG's