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Aguila 7.62x51?

Aisin

Grumpy old fuck
Joined
May 19, 2020
Member Number
304
Messages
2,311
Anyone ever use it? I ran a box of it through my M1A suppressed. It left a blueish green residue on the 3 prong. I have never seen this before.
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I get that color of residue in the muzzle break of my ultra mag sometimes
 
Looks like oxidized copper? Unsure if that's possible but color looks like it.
I think that’s what it is. I thought corrosion at first but it’s not. I didn’t get the discoloration when I ran Turkish NATO or Winchester 7.62 through it.
 
its nothing to worry about.

i shoot FGMM through my bolt gun and the TBAC brake gets that blue-ish color on it all the time. i never give it a second thought.
 
Yup, just copper.
 
Why isn't that more common with other ammo ?

Edit: was that from tarnished or oxidized cases in the first place ?
 
Yeah, i have never seen it before but most of my exhaust is from bolt guns and goes out the barrel .
 
I see it more often on guns that got shot in the rain for whatever reason.
 
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