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[ARCHIVED THREAD] - Sanding inside the magwell

Posted: 9/27/2008 7:44:01 PM EDT

To match an upper I had a lower anodized. The gun works fine, but certain mags are tight in the magwell, to the point of being unusable in this gun. So my thought is to sand the interior of the magwell. I've got other ARs that have various worn areas that don't seem to be a problem, and aluminum doesn't rust, so is there any downside to this plan?

Posted: 9/27/2008 8:02:20 PM EDT

[#1]

the anosize shouldnt add more than .002 to the surface if any at all. are the mags tight in the other ars?

aluminim wont "rust" but will still oxidize

Posted: 9/27/2008 8:05:58 PM EDT

[#2]

Alumimum is really soft under the anodizing... it will wear and gall. Either have the lower re-anodized after loosening up the mag well, or (given how cheap lowers are) get a new lower.

Posted: 9/27/2008 10:29:16 PM EDT

[#3]

I would work on the mags before I went to sanding the mag well

Posted: 9/28/2008 2:39:49 AM EDT

[#4]

I also wouldn't touch the magwell; you can remove but you can't put back. I'd just keep track of the mags do work in that gun and use it accordingly. In time, the magwell will wear out on its own, and hopefully by then you won't have any problems.

Posted: 9/28/2008 6:33:54 AM EDT

[#5]

Sand on a $10 mag or a $200 lower, you choice. But in light of the possibility of totally fucking something up, don't ya want to destroy $10 vs $200?

Posted: 9/28/2008 7:13:57 AM EDT

[#6]

I've never understood this. A $10 mag doesn't fit in a $200 lower and it is always, always, blamed on the lower.

Mags are not exactly a precision piece. Find mags that work and go with it.

Posted: 9/28/2008 7:16:52 AM EDT

[#7]

Quoted:
I would work on the mags before I went to sanding the mag well

agreed, I had a couple of new in wrap center industry mags that were tight fitting. after a couple of range trips they all drop free 100% perfect.

just go shooting and stop thinking too much!

Posted: 9/28/2008 11:48:47 AM EDT

[#8]

Double check the portion of the trigger guard that butts up against the back of the magazine is not causing the bind. That happened to me on a A1 build a while back. Remove the upper, stick a mag in the lower and hold it up to the light. You should be able to tell where it is hanging pretty easily.

Posted: 9/28/2008 12:06:16 PM EDT

[#9]

I've had some mags that had a telfon or dry film coating that were tight in a few lowers. Compared to lowers, mags are disposable.

Posted: 9/29/2008 9:48:28 AM EDT

[#10]

If the aluminum is real soft under the anodizing does that mean a lower with a scrape or imperfection is at risk?

Just thought id ask.

Posted: 9/29/2008 9:59:09 AM EDT

[#11]

Quoted:
Compared to lowers, mags are disposable.

Well, that's the problem here. It's a 7.62x39 AR and the mags that don't fit are hard-to-come-by frankenmags.

Posted: 9/29/2008 11:07:19 AM EDT

[#12]

Quoted:
I would work on the mags before I went to sanding the mag well

NO. You'll make the mags fit too loose in other guns. Adjust the mag well to the mags.

Posted: 9/29/2008 11:09:01 AM EDT

[#13]

Quoted:

Quoted:
Compared to lowers, mags are disposable.

Well, that's the problem here. It's a 7.62x39 AR and the mags that don't fit are hard-to-come-by frankenmags.

Oh, its a 7.62x39? Just throw the rifle away and start over.

Posted: 9/29/2008 11:11:21 AM EDT

[#14]

Put the sandpaper down and step away from the lower !

[ARCHIVED THREAD] - Sanding inside the magwell

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[ARCHIVED THREAD] - Sanding inside the magwell

[ARCHIVED THREAD] - Sanding inside the magwell