It is a Mattel Shootin Shell Sealed Package.There are 30 grey tips with 3 brass casing. Package has some curling.
Push bullet nose prongs into metal casing, as shown and the two parts will automatically lock together into one cartridge
Then if you want, press a Greenie Stick-M-Cap on bottom of cartridge
Don’t have Greenies??? Check the web and yo will find 120’s and 480’s both
If you are a lost in the 50’s Cowboy who loved to play with the Mattel Shootin Shell Cap Guns, then you must have this package for your shooting and collecting enjoyment