never release the bolt slowly. **** it and let er slam home.
WARNING
DO NOT DO THIS ANY PLACE ELSE OTHER THAT POINTED IN A SAFE DIRECTION, AT A RANGE ,OR OTHER SHOOTING AREA, WHERE YOU KNOW YOUR BACKSTOP!!!!!!

doing so anywhere else can be deadly. especially when you have a round chambered and the momentum of the bolt allows the firing pin to be exposed striking the primer setting off the round, AND OR possibly going into slamfire. emptying the whole mag in the shortest amount of time.
occurs in most comblock or us mfg Ak or SKS varients where a floating firing pin is used