Range Ammo Palmetto State Armory: PMC X-TAC 55 GR Brownells: PMC X-TAC 55 GR Lucky Gunner: PMC X-TAC 55 GR Defense Ammo PSA: Hornady Black 5.56 NATO 62 GR Primary Arms: Hornady Black 5.56 NATO 62 GR Lucky Gunner: Hornady Black 5.56 NATO GR