This system is specifically designed for the M203, MK19, GLM, and GMG 40MM Grenade Launchers. The essential tools needed to clean the single-shot, breech-loaded 40MM weapon come packed in the 4" round ballistic nylon softpack case. Included is a 30" Memory-Flex® cleaning rod, patches, solvent, and the tools to give you 360 degree coverage in a 40MM barrel. This system is a perfect fit with the Item# 223-2 (5.56MM M4/M16 Cleaning System).