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Old May 19, 2000, 08:48 AM   #1
Junior Member
Join Date: May 17, 2000
Location: Roslyn, NY USA
Posts: 8
I have been having problems with my Mossberg 12 gauge pump action 590A1. I
have been using all different types of shells for it and many times it has
misfired. I have placed shells in the magazine tube and when I pump the
action back and then foward, I click the safety off and fire. Sometimes it
will fire, sometimes it will not. If it does fire, the next round may
misfire. It has been occuring quite frequently. I first thought it was
because of manual error, because I was not pushing the forearm smartly
enough. But it
has misfired even when I made sure I slammed the forarm foward. Then I
thought the ammo I was using was defective, i usually use slugs, thought
maybe the
primers were too old and they were recessed. But I changed ammo and used
buckshot, birdshot and slugs from various companies and it still happened. It
may happen frequently and sometimes it rarely occurs but every time I go to
the range it happens at least 3 times. I fire approximately 30 rounds and
three, at least, misfires. Misfiring is said in the context that I chamber a
shell and pull the trigger and nothing happens. then i thought it may be a malfunction in the firing pin retainer spring. but not sure though. The round just sits there, I
hear the hammer fall, but nothing happens. You may have to fire a
couple rounds before it misfires. I have a choate pistol grip full stock and
the really expensive sure fire tac light with a dedicated forearm. if i were
to send it for repairs would i have to remove both of these and put on the
normal stuff?


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Old May 19, 2000, 10:06 AM   #2
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Join Date: March 25, 1999
Posts: 3,147
Firing pin?


"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects." -Robert Heinlein
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Old May 19, 2000, 10:44 AM   #3
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Join Date: February 23, 1999
Location: Denver, CO
Posts: 4,273
Hey, looks like Cho found us.

Check in at for some good answers.
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Old May 19, 2000, 04:30 PM   #4
Join Date: May 16, 2000
Posts: 76
Check to see if you have an overtightened the buttstock bolt. I had the same problem with a choate stocked Mossberg 500 and loosening the bolt a small amount solved the problem.
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