Buddy of mine bought himself one of these Crosman PC177 (almost exactly the same as the 1377 American Classic) Pumpmaster Classic air pistol. But after about a week he decided that it wasn't his cup of tea and gifted it to me. It's very accurate out of the box but I was thinking I might do some mods to it. Maybe a steel breech and replace the .177 cal with a .22 cal breech and barrel at 24", then adding a folding stock to make it a backpack silent hunter. Any thoughts on modding these? Reliable parts sources? I'll post a pic shortly. Here's a file foto till then.