I'm going to attempt my first upgrade(s) and I've ordered a Crosman.177 and .22 steel breech kit and a .22 14.6" barrel from Pyramyd Air. Upgrading my 1377 and 1322. I've watched dozens of videos on YouTube and the upgrade looks reasonably easy considering I'm not mechanically inclined. I'm also looking for a silencer/moderator for the 14.6" barrel, any recommendations? I recently added a Buck-Rail Silencer/Moderator to my 1377 and the modification to the 1377 went well and the gun is very quiet and cost less than $25.00. I'm adding the steel breech to the 1377 because I've got a loose barrel and I'm hoping the steel breech solves that problem. I'll throw in a plug for Buck-Rail, everything I've gotten from him works extremely well and the prices are very, very good. Future upgrade includes adding the AR-15 style stock to my 2240XL from Buck-Rail once he gets those back in stock.