The Model 2552 Sting-Ball rubber pellet cartridge is designed to be skip fired in situations where collateral damage and serious injury to bystanders is to be avoided. A high-velocity Model 2553 is also available as well the 2555 , a three rubber pellet round of 60 caliber. The Model 2570 breaching round is designed to defeat door locks and hinges. It is fired four to eight inches from the target. The payload is a compressed metal powder slug. Upon impact, it disintegrates and imparts its high kinetic energy to the target. Debris and fragments behind the target are low in energy and ricochet from the slug are virtually non-existent. SPECIFICATIONS: Model 2552: Load-18 .31cal Rubber Balls, Total Weight-18gm(0.6oz) Model 2553: Load-18 .31cal Rubber Balls, Total Weight-19gm(0.7oz) Model 2555: Load-3 .60cal Rubber Balls, Total Weight-18gm(0.6oz) Model 2570: Load-Powdered Metal Slug, Total Weight-35gm(1.4oz) Compatibility- Cylinder and improved cylinder 12ga shotguns. Do not fire breaching round at person (s). For use only by qualified personnel trained in the use of these products.