This app was mentioned in 3 comments, with an average of 0.33 upvotes
There is a gun app that makes gun sounds and flashes when you shake your phone, and there is a revolvor that you can load manually, so you can only put one bullet in.
https://play.google.com/store/apps/details?id=com.calfordcn.gu&hl=en
get rid of the gun, get this: https://play.google.com/store/apps/details?id=com.calfordcn.gu
problem solved.