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Old May 31, 2012, 08:16 PM   #1
Nick S.
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Disassemble Mossberg 500 A

The trigger assembly won't come out after I removed the pin. Do I have to remove the butt stock first? I don't have a pistol grip. It's a regular old wooden stock. I've watched several videos on the 500 and it comes right out. The only video I found on the 500 A had a pistol grip and that's why he said the stock had to be removed.
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Old June 1, 2012, 12:38 AM   #2
UnbearablePanda
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Buttstock is always first. Than the trigger should be able to be pulled up.
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Old June 1, 2012, 01:15 AM   #3
hoytinak
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You don't have to remove the buttstock on a 500 to field strip it. After you take the trigger assembly pin out the trigger assembly should pretty much just fall out. Mine's the old wood stock and I just did it to make sure.
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Old June 1, 2012, 02:04 AM   #4
UnbearablePanda
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Well if its new yes. My 590a1 and my friend 500 wouldn't come out unless we took out the buttstocks. If youve worn it in enough it wouldn;t block the trigger set.
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Old June 1, 2012, 06:33 AM   #5
kx592
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i have a new 590a1 and no need to take the butt off, only if its a straight pistol grip to my knowledge. Just give a tug from the butt end of the trigger group up and back and should come out.
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Old June 1, 2012, 07:19 AM   #6
hogdogs
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Buttstock bolt needs a washer or 2 or carefully shortened on a grinder as it is binding up on trigger housing so needs relieved anyway as that is not part of the planned design...

Brent
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Old June 1, 2012, 07:21 AM   #7
hogdogs
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Will only get worse as gun "wears in" as bolt head will dent in the stock as well as bolt will stretch a tiny bit being soft metal and so long...

Brent
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Old June 1, 2012, 03:16 PM   #8
Nick S.
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Got it.

UnbearablePanda was right. Maybe that's the difference between the 500 and the 500a. It came right out, no problem after I completely removed the stock. As I gradually loosened it, the housing got looser & looser but wouldn't come out until removed. There were already 2 washers under the bolt head. I tried adding a 3rd & put it all back together but nothing changed. Then I put it back together without the trigger assem. & looked at the threaded part where the bolt threads in. It was shy of even coming flush by a few threads. So I removed the 3rd washer & reassem it again to retain full thread contact into the receiver. I think the situation is that the rear,rounded tang on the trig/assem fits so tight in the stock, that there's no swing room for it to lift out. The front edge of the trig/assem hooks into the receiver so the rear must swing in an arc as it's lifted. The only other way to change things would be to file away a clearance angle on the tang which might weaken the perfect fit it now has. I want to thank everyone for all the tips. After today I feel like I could take it apart & back together blindfolded.
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Old June 1, 2012, 03:31 PM   #9
scottd913
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try raking the forend back half way the trigger group should lift out
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Old June 1, 2012, 03:45 PM   #10
Nick S.
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I'm not sure what you mean. That front edge was hooked in pretty good. I tried forcing it back enough to slip out but I couldn't do it without feeling like something might break. It's only plastic.
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Old June 2, 2012, 12:29 AM   #11
UnbearablePanda
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Had the exact same problem not too long ago actually Called up a friend with a 500. Said he just removed the stock first and I had to facepalm myself for not noticing. The internals are freaking amazingly easy to put in and out after the first time .I wouldn;t cut anything or even try to sand it down. When my ATI Pro stock came in it stated that it shouldn't be pushed together. Leave a tiny bit room left together within the holding spaces. Guns are expensive, don't damage anything!
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Old June 2, 2012, 07:11 AM   #12
hogdogs
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One more time... the stock bolt is BINDING and SHOULD NOT be hitting the trigger group... Over torquing is usual cause.... even from the factory.

Brent
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Old June 2, 2012, 02:33 PM   #13
UnbearablePanda
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It doesn't seem like it...... Even with my ATI stock it wont come out without removing it. Since it is touching the trigger group. I really don't see how, plus the original stock was REALLY easy to come out. So how does that make it over tightened?
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Old June 3, 2012, 05:13 PM   #14
Nick S.
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Hotdogs,as I said, when I put the stock back without the trigger group & looked at the place where the stock bolt threads in, it wasn't protruding at all. The stock just presses in & captures the rounded tang very tightly.
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