Yes!! We got the frangible 5.56 in, partly because I love different and interesting ammo, and partly because actually some ranges require it. For anyone who doesn't know what frangible means, here's what wikipedia says:
A frangible bullet is one that is designed to disintegrate into tiny particles upon impact to minimize their penetration for reasons of range safety, to limit environmental impact, or to limit the danger behind the intended target.
Frangible bullets will disintegrate upon contact with a surface harder than the bullet itself. Frangible bullets are often used by shooters engaging in close quarter combat training to avoid ricochets; targets are placed on steel backing plates that serve to completely fragment the bullet. Frangible bullets are typically made of non-toxic metals, and are frequently used on "green" ranges and outdoor ranges where lead abatement is a concern.
And, indeed, these are non-toxic (no lead).