CMMG Resolute 300 Mk57 5.7x28mm
5.7x28mm cal., radial delayed blowback operation, 16.1 in. CM barrel, A2 compensator, FN Five-seveN magazines, 6-pos. RipStock, CMMG RML15 M-LOK free floating handguard, CMMG ambi safety selector, forged Mk57 aluminum receivers, 6.1 lbs. Mf...