Glocks Rust...G19.4 US Made

So this presented itself today before a cleaning. Since the last cleaning three months ago it only saw 5 rounds of TulAmmo and 50-ish S&B 115 FMJ. Total round count is right at 1000, this is a 2016 vintage pistol.

I believe there may have been a flaw in the (enter name of nitrocarburization method used) process.

https://uploads.tapatalk-cdn.com/201...dbfdcfe24a.jpg

And after a serious scrubbing session:

https://uploads.tapatalk-cdn.com/201...c8281acea4.jpg

That’s some nice fine pitting. There are two other small areas in the bore that I can’t get a good look at so they may be fouling but given the scrubbing the bore got I am leaning to rust there as well.


After over 20 years of owning and shooting Glocks, this is the first rust issue I have encountered (personally).

I will call Glock next week.


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Wondering if the only affected area is at the muzzle whether some outside source of contamination could have entered the muzzle and caused the problem??

Copper and carbon are both very aggressive toward iron in a galvanic cell. I don't know how perfectly the Tenifer (or whatever version they call it when done here) will resist that under what conditions. It's possible humidity could have led to that. Temperature changes can lead to condensation in spring.

I had something similar happen to a Glock 19 Gen4 that a humidifier pad had fallen and all the stuff got inside the barrel like that. I cleaned it shot it and still carry the gun.

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Originally Posted by flyrodr

Wondering if the only affected area is at the muzzle whether some outside source of contamination could have entered the muzzle and caused the problem??

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flyrodr, you beat me to it. Dangerous thread drift ahead.....love your Avatar - if only it was that easy!

I rusted a Gen 2 23 in the cocking serrations. I also rusted one of my 43s around the rollmark on the slide.

They're metal. They'll rust.

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Originally Posted by flyrodr

Wondering if the only affected area is at the muzzle whether some outside source of contamination could have entered the muzzle and caused the problem??

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While remotely possible, it is highly unlikely.

Tulla and other Russian ammo uses a bi-metal (soft steel and a copper wash) jacket on much of their ammo. The rust may very well be due to the steel from the ammunition jacket and not actually on the barrel material itself.

Quote:

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Originally Posted by Suvorov

Tulla and other Russian ammo uses a bi-metal (soft steel and a copper wash) jacket on much of their ammo. The rust may very well be due to the steel from the ammunition jacket and not actually on the barrel material itself.

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Excellent point

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Originally Posted by Greg

Excellent point

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Thanks but on closer inspection of his photos (I was on my phone ) it does look like it’s gotten into the barrel material. 😕

Quote:

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Originally Posted by Suvorov

Thanks but on closer inspection of his photos (I was on my phone ) it does look like it’s gotten into the barrel material. 😕

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It is the barrel that is pitted.

Shoot it, and enjoy it. I have a Remington 1911 manufactured in 1943 that has pitting up and down the barrel. It will put rounds on top of each other at 15 yards.

Pitting isn't ideal, but if it doesn't affect anything, especially in a barrel, not as exposed to elements as the outside of the pistol, I wouldn't loose sleep.

The inside of a pistol barrel is a very violent place, and even with Glock's, whatever finish they are using this week, there can spots that didn't hold the treatment as well.

Glock would possibly replace the barrel if you wanted to pursue the matter with them. The again, they may tell you it's a feature... :)

I would recommend though that with a carry gun, to at least do an inspection once a month even if you don't shoot it. Take it down, use a little oil and swab out the barrel. Preventative maintenance can go a long way. That isn't saying glocks or most any other pistol can't run fine without it, but if the time is available, why not.




TXPO

Call Glock, probably a 90% chance they'll replace the barrel for free.
No need to live with a pitted barrel when a replacement only cost you a bit of time and effort.