This is a 4.6x30 HK Fiocchi 30gr. Non-Toxic Frangible Ammo. This round is designed along the same lines as the 5.7x28 round. The frangible projectile makes this round a great option for training with steel targets due to the extremely reduced chance of a dangerous ricochet. It's also great for use at indoor ranges since it features a zero lead SinterFire projectile and a lead-free primer. Usable in the H&K MP7. This ammo is brass cased, boxer primed, and non-corrosive. It comes packed in 50rd. boxes.