I've got an old .32acp Ruby pistol manufactured in Spain for sale here in the U.S. and sold under the name "Vilar". Field stripping of these little pistols is pretty straight forward. My little pistol, however, has a little snag. After twisting the barrel to unlock the barrel from the frame, the slide catches on something in the frame, instead of sliding off. Can anyone with any knowledge about these pistols chime in about something I might be overlooking, or any commonly known issues or broken parts that would cause this? Thanks in advance for any replies.