PMC X-TAC 5.56 NATO FULL METAL JACKET RIFLE AMMO Manufactured to the exacting specifications required by such organizations and demanded by our customers, X-TAC(TM) is the choice for the professional and enthusiast alike. At PMC, they know your job demands that you think of everything. But PMC also know that when the chips are down you shouldn't be thinking about your ammunition Mfg: Pmc Ammunition, Inc.