This is 5.56 PMC X-TAC 55gr. (XP193) Full Metal Jacket Ammo. The PMC X-TAC Line is manufactured to the highest industry and military specifications to ensure its performance, without fail, when your life is on the line. PMC’s X-TAC ammunition is powerful, accurate and dependable, because in a life-threatening situation, no other standard is acceptable. PMC’s exacting adherence to the precise specifications of military and law-enforcement organizations assures that X-TAC ammunition will perform perfectly in that fraction of a second when a serious threat arises. This ammo is brass cased, boxer primed, non-magnetic and non-corrosive. It comes packed in 20rd. boxes. Muzzle Velocity: 3270 fps.