Feature SCSC-04 9mm Snap Caps Totally Safe, Totally Safe and Totally Safe. A snap cap is a device which is shaped like a standard fire-arms cartridge but contains no primer, propellant or projectile. Snap cap is designed to be a fake cartridge from the very beginning. It serves the same function as a dummy round, but different in that a dummy is usually made from a real cartridge with its propellant and primer removed (still has the projectile and the casing). 9mm, Aluminum Alloy, Red Anodizing, w/ Sling, 6 Pieces in 1 Pack Specification Specification Details Size Same as real cartridge Material Aluminum Alloy Weight 5 g / 0.2 oz Finish Red Anodized Quantity 6 pieces Primer Soft Silicon Offers Versatility Training, storage, testing, practice