PPU Blank 7.62x39mm Ammo Brass Cased ammo review offers the following information; PPU manufactures many calibers of brass cased blank cartridges. Most are full cased types, i.e. they have an extended case shaped similar to a loaded round. This provides reliable functioning in all types of weapons. Please note that correct blank firing adapter must be used on the gun to ensure semi or full automatic operation. Throughout our history we have continuously widened our assortment and successfully kept up with trends and technology, always keeping in mind the needs of our increasing number of customers. Thanks to continuous innovations and timely transformation whenever it was necessary, we have established ourselves as a modern company with a high reputation.