In used condition, I have only used a few times.

The end cap is steel and combining this with the standard tm bolt gives one of the heaviest bolt configurations giving great recoil.

likewise putting the standard bolt end cap onto the hao bolt will give you one of the lightest configurations, so ideal when you want a lite bolt set up for winter and a heavy set up for summer.

Bolt does.not always lock back on empty however, this can most likely be remedied by filing the little nub on the underside of the bolt to interlock with the reciever bolt catch better.

Price includes delivery 

Does not include nozzle, bolt case only