G2 Research Trident RIP Ammo is perfect for personal defense. Each round is precision machined for greater reliability and consistency of shot. The casing is brass and are completely reloadable. RIP rounds defeat all known barriers in its way, including sheet metal, sheet rock, windshields and plywood. And with 9 separate wound channels and a penetration of 14" -16", it truly is "the last round you'll ever need."