What is the easiest way to place a new retainer on the barrel takedown screw on a Mossberg 500? I recently traded for a 500. When I removed the barrel to clean the gun, the barrel takedown screw came out. After inspecting, I saw there was not a retainer on the takedown screw. I attempted to put the new retainer on the barrel tonight, but I am not making any progess.
Any info greatly appreciated.