Product Details Additional Information Cmmg Resolute Mk4, Semi-automatic Rifle, 5.7x28mm, 16.1" Barrel, Threaded 1/2x28, Zereoed Sr Brake, 15" Free Float M-lok Handgard, Zeroed Polymer Grip, Cmmg Ripstock, Manual Safety, 32 Rounds, 1 Magazine 54a40be-mb