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Mossberg 500 issue

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Has anyone ever had their Mossberg still have the pump slide locked after firing? When I shoot mine I have to manually hit the release in order to pump and cycle my shotgun. Any suggestions to this cause would be helpful.
 

etrain16

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Haven't run into this myself, or heard of it. Is this a new gun? Has it ever done this before? The first thing I wonder though is have you recently disassembled and reassembled the shotgun? Perhaps something didn't get put back quite right.

If not, maybe @Velzey has a suggestion.
 

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