Ive been having an 07 PMR since they came out. But i stopped playing paintball for about a year now and im about to start again. So im wondering if i have to do any changes to the O rings cause i havent used it or put any air into it since then. I would prob gonna have to lube the bolt, i know that for sure. But before i stopped playing the gun shot great, no problems at all. I would really appreciate all the help.