Things I liked:Reliable and does not have spring fatigue. Things I would have changed:Can't think of anything. What others should know:My piston actually had some problems and jammed up after about 200 shots. Pyramid air replaced it for free after i sent it in and it works great. Probably just an unlucky piston conversion.
There is still some recoil even after this conversion piston is added to your rifle, so i recommend getting a scope stop.