I recently bought a M1938 Kale, it shoots about a foot off at a 100 yds. So when i whacked the blade to move it, the whole unit came loose and fell off. The pin that goes into the barrel, moved up in to the base and i can't get the blade off, any suggestions? i guess i could just epoxy it and SWAG the windage. Kind of a cheap set up.TIA..........Semper Fi