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  #1  
Old 02-11-2020, 05:55 AM
Lethemgo
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Mossburg 51M



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This rifle followed me home from a gun show so had to have a range day. Didn't go real well as she had a extremely hard trigger unlike another one of these I had that one had a sweet trigger. Plus wouldn't feed ammo i was using. Will try different ammo next time after a strip down and clean up but want to fix a couple of the problems first. Front sight flops around could just be a clean up and looks like it locks in after adjusting. Not sure haven't seen one like this or taken one apart. Doesn't look to bad to take apart gun but will take pics as i go. Hopefully a clean up and different ammo will fix the feeding problems.
Most certainly want to do something with trigger pull. That's different too with fingers on trigger that push a bar and lift it off of sear looks like by rocking the two parts together lifting it but for some reason it doesn't disengage until its forced to pop off. Pin that trigger fingers push on are bent forward I'm sure contributing to the stiffness.
Any suggestions on any of these problems would be greatly appreciated...thanks! Dont see a serial # anywhere except a date on trigger guard.
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  #2  
Old 02-11-2020, 08:19 AM
bone

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Not a whole lot you can do to lighten the trigger, other than cleaning and lightly polishing the engagement parts. The parts are only surface hardened, so no major filing on them, if you want them to last.

There should be a write up in the stickies about a trigger spring flip that may help some.

I have 3 different coneback rifles and all 3 triggers have a different pull. Out of all the mossbergs I own, they have the heaviest triggers. But they are not to bad once you get use to them.
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  #3  
Old 02-11-2020, 10:30 AM
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Like bone said these parts are only case hardened. So any heavy filing will get under the case to softer metal. Polish lightly but keep the surfaces square. Would like to see a pic of the entire rifle?
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Old 02-11-2020, 11:28 AM
Lethemgo
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Getting her back together after a good cleaning. Got the trigger kind of acceptable by bending the forks closer together. They were pretty spread apart a it may have been possible only one side would slip off and the other doing all the work which probably caused the pjn they push forward to bend. Straightened that pin so getting close. Not going to polish anything yet but may in the future. I'll post a picture later after cleaning front and rear sight up. Thanks guys
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Old 02-11-2020, 12:10 PM
Lethemgo
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All dressed up and ready for a trip to the range tomorrow. Going to redo stock more than likely mostly because there are some spots where something got spilled on it and finish is a little messed up. While cleaning up front sight realized it has 3 different sight inserts a round open, a small post and a large post.
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  #6  
Old 02-11-2020, 01:27 PM
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Your front sight...

Your front sight should have 4 posts. An aperture, a lollipop, a skinny post and a thick post, so it looks like you are missing one... or you missed one!!!
The lollipop is the one standing up inside the hood and the aperture I see folded down on the side. Don't see a skinny or thick blade, but it could easily be hiding behind the aperture post.
God Bless, Frank.

Last edited by tfrank; 02-11-2020 at 01:30 PM.
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Old 02-11-2020, 01:33 PM
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Oh and...

Oh and stick to standard velocity or sub-sonic ammo. I think the reason is obvious!!!

Nice complete rifle, by the way!!! Except for maybe the one sight post!!!
God Bless, Frank.
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Old 02-11-2020, 01:41 PM
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Didn't see a picture of...

Didn't see a picture of the trigger spring installation. There are at least 2 ways to install the trigger spring and have it work correctly. This link shows both ways. Good luck with your 51M(a)
https://www.rimfirecentral.com/forum...77&postcount=4
God Bless, Frank.
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Old 02-11-2020, 02:28 PM
Lethemgo
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Thanks Frank....I installed it like the top 2 pics it was the way it came out of there. Yes the thick post is there and I'm not sure on the thin one. I'll have to check!

Last edited by Lethemgo; 02-11-2020 at 02:30 PM.
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  #10  
Old 02-11-2020, 03:32 PM
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The thin one has a tendency to 'hide' behind the wide/thick one due to being gummed up.,it's unusual to see one missing.
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Old 02-11-2020, 06:43 PM
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I love those old Mossy sights. Only thing is I find is that the unused/exposed sight is somewhat at risk of being broken off.
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  #12  
Old 02-11-2020, 07:19 PM
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In almost 30 years of collecting Mossbergs I've seen maybe 1 or 2 rifles with broken sight posts,mostly I've seen missing sight hoods and some sights people have taken apart and lost or removed some of the sight posts.
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Old 02-11-2020, 09:31 PM
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thats a fine looking rifle , very nice ,
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  #14  
Old 02-11-2020, 11:24 PM
LuckyGuy
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Post Wellllll

Quote:
Originally Posted by Lethemgo View Post
This rifle followed me home from a gun show so had to have a range day. Didn't go real well as she had a extremely hard trigger unlike another one of these I had that one had a sweet trigger. Plus wouldn't feed ammo i was using. Will try different ammo next time after a strip down and clean up but want to fix a couple of the problems first. Front sight flops around could just be a clean up and looks like it locks in after adjusting. Not sure haven't seen one like this or taken one apart. Doesn't look to bad to take apart gun but will take pics as i go. Hopefully a clean up and different ammo will fix the feeding problems.
Most certainly want to do something with trigger pull. That's different too with fingers on trigger that push a bar and lift it off of sear looks like by rocking the two parts together lifting it but for some reason it doesn't disengage until its forced to pop off. Pin that trigger fingers push on are bent forward I'm sure contributing to the stiffness.
Any suggestions on any of these problems would be greatly appreciated...thanks! Don't see a serial # anywhere except a date on trigger guard.
The mag. tube shoots the bullet into bore when the bolts snaps back. It is not striped off when coming forward. At least that is what I see with mine.
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