When you pull the trigger, the hammer retracts and fires and the cylinder advances. I believe the circular areas above the grip originally held red "gems, " which are now obviously missing. Also the grip once had a brass finish, which has worn away.
This replica gun contains the colored markings required by law, including a permanently attached orange plug. If your listing does not display those markings, then it is not permitted u. Firearms, weapons, and knives policy.