I recently bought a used Ruger Mark II and I'm pretty sure the gun had NEVER been completely field-stripped for a clean, nor did the previous owner clean it at all it seemed. I found out why it hadn't been completely field stripped when I removed the bolt and tried to remove the receiver/barrel from the frame myself. HOLY SH*T!!! Several people online said if there's difficulty removing the reciever/barrel from the frame on a particular Mark II then a mallet is needed to beat them apart. During three separate cleanings now I've beat the back of the receiver on that bad boy harder than I've EVER pounded on ANY gun in all of my years, and I'm STILL having to clean the gun with both parts attached bc I can't get even a quarter millimeter of separation. Any suggestions would be GREATLY appreciated!! Thanks in advance!