Made in the USA, this MagBrush by Kleen-Bore is an important item for competitive shooters, law enforcement, military or wherever positive ammo feeding is critical. It cleans and addresses a commonly overlooked area of maintenance on magazine-fed firearms. The brush removes gummy reside, dust, dirt, and unburden powder from inside the magazine and well for quicker, easier magazine release and increased reliability for cartridge feed. It is compatible with staggered stacked magazines.