Replacement bullets for Toy Gun with Ejection

I designed these to work with my son toy gun from aliexpress, they don't shoot anything, unlike the original, but it's perfect for just playing with the ejection feature of the toy gun. I made the profile to print in 99 walls to make them as heavy as possible. Here is the link to the toy gun that eject spent cartridges. . Here is a link to a holster I made for the same toy gun.