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Old October 7th, 2020, 09:57 PM #1
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Interior Coating for Completed 80% AR Lower

I searched but couldn't find what I was looking for.

Once the anodized 80% lower is completed, do you put a finish on the bare aluminum? If so, do you paint the pin and selector holes or does the coating make the holes too small?

What is a good DIY coating (e.g. DuraCoat, AlumaHyde)?

Thanks!
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Old October 7th, 2020, 10:01 PM #2
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Quote:
Originally Posted by 2nd=Good+Substantial View Post
I searched but couldn't find what I was looking for.

Once the anodized 80% lower is completed, do you put a finish on the bare aluminum? If so, do you paint the pin and selector holes or does the coating make the holes too small?

What is a good DIY coating (e.g. DuraCoat, AlumaHyde)?

Thanks!
There is no need, as the FCG pocket really gets no wear. I have run into problems with the hammer/trigger pins fitting well. I just use anti-walk pins (sorry, Lord Chad) or pins with retention screws.
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Old October 7th, 2020, 10:07 PM #3
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Quote:
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There is no need, as the FCG pocket really gets no wear. I have run into problems with the hammer/trigger pins fitting well. I just use anti-walk pins (sorry, Lord Chad) or pins with retention screws.
I have never heard of “anti-walk” pins, but I need a set for one of my polymer80s....... thanks.
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Old October 7th, 2020, 10:22 PM #4
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Quote:
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I have never heard of “anti-walk” pins, but I need a set for one of my polymer80s....... thanks.
KNS Precision makes them

https://www.knsprecisioninc.com/prod...mmer-pin-sets/

As Teratos stated, if you take a SOTAR class, you'll likely hear the reasons why they aren't recommended.

However, as with anything, there can be use cases for them. As long as you know the benefits and disadvantages, you can decide whether or not they'll work for you.
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Old October 19th, 2020, 09:06 PM #5
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If you don't do something with the bare aluminum, won't it corrode a bit?
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Old October 19th, 2020, 09:28 PM #6
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If you don't do something with the bare aluminum, won't it corrode a bit?
Aluminum quickly develops a thin layer of oxidation that prevents further corrosion - it's not like steel. IMO it's not something to worry about, but I am FAR from an expert on this subject.
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Old October 19th, 2020, 09:35 PM #7
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Aluminum quickly develops a thin layer of oxidation that prevents further corrosion - it's not like steel. IMO it's not something to worry about, but I am FAR from an expert on this subject.
Agree.
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Old October 19th, 2020, 09:49 PM #8
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Agree.
That I'm FAR from an expert on this subject?
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Old October 19th, 2020, 09:50 PM #9
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Quote:
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That I'm FAR from an expert on this subject?
That’s what I meant...
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Old October 19th, 2020, 10:03 PM #10
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Any decent paint would be fine. The factory would anodize it, but Type III (hard) anodizing is not something most of us can accomplish at home.
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