At around the 500 shot count my new rifle began to leak air when pumped. So I ordered a rebuild kit from Pyramyd Air and installed it. At that time I polished some of the valve internals and even more time to polish the hammer spring and hammer assembly again. The gun now shoots better than ever; much better than when new. Total shots to date is over 2,000 rounds and counting. To improve the trigger pull I am next going to install a super sear from AoA. Every time I shoot this rifle it reminds me of why I shoot at all – to have fun!