Fun read.  Do you know how long Boeing 707's have been retired?  You might need to learn a little something about guns.  On a handgun it's called a slide, not a receiver.  Ruger makes several .22 revolvers that hold 6, 9,or 10 rounds depending on the model.  The ruger .22 semi automatic holds ten rounds in the clip.  Revolvers do not have a safety.