SinterFireA(R) Special Duty Ammo combines the devastating effects of the hollow point projectile with a lead-free frangible design that disintegrates upon impact with hard surfaces-creating a duty round that delivers superior stopping power along with added safety. Frangible ammo is significantly less likely to over-penetrate, making it the ideal choice for home defense and law enforcement use. All SinterFire lead-free, frangible projectiles are manufactured using an exclusive blend of copper and tin composite material and a proprietary heat treatment process. SinterFire is the originator and innovator of this technology used by government, military and law enforcement personnel since 1998. Order today!