This is Hornady Critical Duty 9mm 135-grain ammo equipped with the Hornady® FlexLock® bullet.

More about Hornady Critical Duty ammunition: 

Designed to meet the needs of those who demand superior barrier penetration and prefer a full-size handgun for their personal protection. Critical Duty® is loaded with the tough Hornady® FlexLock® bullet that delivers “barrier blind” performance when shot through common urban barriers.

The FlexLock® bullet incorporates two revolutionary Hornady® features to deliver superior barrier penetration and consistent performance in FBI tactical handgun ammunition tests (FBI Protocol).

The patented Hornady® Flex Tip® design eliminates clogging and aids bullet expansion. A large mechanical jacket-to-core InterLock® band works to keep the bullet and core from separating for maximum weight retention, excellent expansion, consistent penetration and terminal performance through all FBI test barriers.

Bright nickel-plated cases simplify chamber checks in reduced light. Additionally, all Critical Duty® ammunition is loaded with low-flash propellant to help preserve night vision in low-light firing.