Developed specifically for rifled grenade launchers such as the U.S. M203 and our TGL-1, this cartridges projectile engages the rifling. As a result, the projectile is spin stabilized and therefore highly accurate. The propelling system is similar to the one used in the U.S. M781 40mm practice round which uses an M212 high and low pressure chamber cartridge case. This proven design keeps reliability high and costs low. While the Model 4557 sponge round is very price competitive, the high cost of practice and qualification ammunition is addressed with the 45 series reload kits. Available in 48, 72, 96, and 120 round configurations, these easily assembled components reduce training costs without sacrificing the performance levels of operational rounds. OPERATION: The round can be launched from a U.S. M203 or similar launcher such as our TGL-1, TGL-6, or M79. The rubber foam ogive deforms during impact, imparting the kinetic energy over a wide surface. SPECIFICATIONS: Overall Weight: 100g Projectile Weight: 60gm Overall Height: 4" (101.6mm) Muzzle Velocity: 250 fps Shots to the head, neck, spine, thorax or heart can result in fatal or serious injury. For use only by qualified personnel trained in the use of these products.