Need help for AR15 Take down pin

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zeda3000
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Need help for AR15 Take down pin

Post by zeda3000 » Wed Aug 21, 2019 3:06 pm

Ok Guys as you know i am living in Turkey and we dont have experinces like your about AR15 system. I had realized after my rifle coated with Ceracote the rear (Take Down) pivot pin getting very tight and almost stuck in housing. I have to use Rubber hammer to take off every time. During gun breaking position , pivot is very relax and had no problem push in and take off back. It is just happening during i am close the rifle completly. (I think it happening. when pivot pin meeting with upper hole)

I just want to know how may have better experince , why it could happening?

thanks for help

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Lthrnck1775
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Re: Need help for AR15 Take down pin

Post by Lthrnck1775 » Wed Aug 21, 2019 3:56 pm

First guess.... you had closed the upper and lower with the pin in and bent it? Surely some CLP or Oil would make it move better if it wasn't bent?
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Ghostwolf308
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Re: Need help for AR15 Take down pin

Post by Ghostwolf308 » Wed Aug 21, 2019 5:30 pm

Possible that the pin holes got cerakoted and tightened up the tolerances
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jgillaspy
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Re: Need help for AR15 Take down pin

Post by jgillaspy » Wed Aug 21, 2019 5:46 pm

My guess is you have cerakote on the mating surfaces of both the upper and lower forcing them apart just enough to make the pin hard to work.

JG
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ncjw
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Re: Need help for AR15 Take down pin

Post by ncjw » Wed Aug 21, 2019 8:38 pm

Agreed. Some fine sanding on the hole (1st choice) or pin (2nd choice, because if it upper specific, you don't want to touch the pin if you can help it) should be fine. Tests showed that you don't need a super tight lockup between the upper and lower (and hence Accuwedges are a waste of money). So if you go a touch too far, it won't hurt anything (especially if I remember, it is a .410 AR).

If opening the hole a bit doesn't work, it may be the entire mating surfaces as above, which might be a bit more sanding.
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zeda3000
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Re: Need help for AR15 Take down pin

Post by zeda3000 » Wed Aug 21, 2019 9:48 pm

Thanks guys ,these comments is real logical and helpfull. I have all tools here , inculuded Accuwedges also. I know it is waste of money buy i just bought it.

I will sand surface and add there extra gress lubricate. I will share the my comments.

Thank you all.
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colonel00
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Re: Need help for AR15 Take down pin

Post by colonel00 » Wed Aug 21, 2019 10:07 pm

I've had tight pins before. Usually they loosen up after a while. I'd go out and just shoot a bunch :D
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ncjw
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Re: Need help for AR15 Take down pin

Post by ncjw » Thu Aug 22, 2019 12:01 pm

zeda3000 wrote:
Wed Aug 21, 2019 9:48 pm
Thanks guys ,these comments is real logical and helpfull. I have all tools here , inculuded Accuwedges also. I know it is waste of money buy i just bought it.
I know that they aren't supposed to help, but I bought a super cheap AR15 once that had a really loose fit and put one in anyway.

If you have an Accuwedge in there now, definitely take it out and see what happens.
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zeda3000
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Re: Need help for AR15 Take down pin

Post by zeda3000 » Thu Aug 22, 2019 12:15 pm

ncjw wrote:
Thu Aug 22, 2019 12:01 pm
zeda3000 wrote:
Wed Aug 21, 2019 9:48 pm
Thanks guys ,these comments is real logical and helpfull. I have all tools here , inculuded Accuwedges also. I know it is waste of money buy i just bought it.
I know that they aren't supposed to help, but I bought a super cheap AR15 once that had a really loose fit and put one in anyway.

If you have an Accuwedge in there now, definitely take it out and see what happens.

Accuwedge not installed into my rifle. I just bought that to see how is working. It is too early to use in my rifle. I try to sand the two holes , but hard to get there. I have to buy round Rasp to get there. My rasp tool is triangle. But is pretty sure Ceracote. Without upper recivier, pims working very relax. I have very strong paint remover but i dont know if it working on ceracote? I can put into hole with cotton swabs a little bit.
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37L1
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Re: Need help for AR15 Take down pin

Post by 37L1 » Thu Aug 22, 2019 2:27 pm

Paint remover won't work on the Cerakote. You could roll up some fine sandpaper/emory cloth tight on a drill bit so it will fit in the pin hole and spin it around, not too fast. It might do the trick for you. JFYI, I had a buddy who got his AR "dipped" and had the same problem. We got it done with the sandpaper.
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Sandpaper
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Re: Need help for AR15 Take down pin

Post by Sandpaper » Tue Sep 10, 2019 11:36 pm

jgillaspy wrote:
Wed Aug 21, 2019 5:46 pm
My guess is you have cerakote on the mating surfaces of both the upper and lower forcing them apart just enough to make the pin hard to work.

JG
I would tend to agree with this assessment based on your explanation of the issue. Sounds like the coat on the bottom of the upper and top of the lower are causing a tolerance issue and misaligning your pinholes. Any luck yet?
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zeda3000
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Re: Need help for AR15 Take down pin

Post by zeda3000 » Wed Sep 11, 2019 12:21 am

Sorry guys , i just forgat about this topic. The diagnosis is correct!. Cerakote made extra thickiness arround the housing of pin. I clean it with sand paper and rasp. Now much more better. Next time i will warning to cover these places before painting. Thank you all.
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