https://thecastlearms.com/product/pmc-556k-x-tac-5.56-nato-62-gr-light-armor-piercing-lap-20-bx-50-cs#product_detail

PMC 556K X-Tac 5.56x45mm NATO 62 gr Light Armor Piercing (LAP) (Box of 20)

Manufactured to the exacting specifications required by such organizations and demanded by our customers, X-TAC is the choice for the professional and enthusiast alike. At PMC, we know your job demands that you think of everything. But we also know that when the chips are down you shouldn't be thinking about your ammunition.