This is the 4th firearm I've created. Modelled after a .32 cal Smith & Wesson snub-nose revolver. The cylinder does spin but this is a non-working prop built to be played with, handled, etc. The cartridges are a separate set of components that need to be put in the cylinder before assembly. I swear by Shoe Goo for all my assembly required projects. https://eclecticproducts.com/product/shoe-goo/ After about 15 minutes, you can easily peel any excess glue. The cartridges fit nicely in the cylinder, give the model some weight and will make a clicking sound when the cylinder is spun. In addition to the 2" barrel and the stock grips, I've included a 3" barrel and a fatter set of grips. Also printed a couple sets of grips in TPU but this is not necessary.