common on that model. the forearm latch is worn. its loose on the bbl lug it hooks into. it looks like a little hook under the forearm. see it? there is a leaf spring that gives tension under the plate. replace them.
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Retired Military Aviation
Former Member Navy Shooting Team
Distinguished Pistol Shot,NRA Shotgun/Pistol Instructor
NSSA All American, Skeet/Trap Range Owner
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