Pitting in Glock barrel

R

ROSANGHAL

New member
Just wondering if anyone out there has found or experienced any pitting in their Glock barrels?

Found some in my 23 and have only fired factory non-corrosive rounds through it and they get cleaned later on in the day after shooting sessions.

Thanks
Ross T.
 
I have never experienced any pitting in my Glock barrels. I stressed test an M22 Glock last year and fired over 10,000 rounds without cleaning over a 10 month period, no pitting. Also, have stored similar Glocks for several months dirty, no pitting. If your Glock has a factory barrel, I do not think it should have pitted. It may be time to express your factory warranty.....

Best Regards.....
"Train to Defend, Train to Survive, Train to Win"
 
It is probably flaking of the Tennifer finish on the inside of the barrel. From what I have heard it is normal.
 
TacTrain

Yeah I'm thinking about checking out the factory warranty after reading several articles on torture testing and now hearing you fired over 10,000 w/o cleaning over 10 months and no pitting, just wanted to see if anyone else hear had the same experience and if they had trouble getting a new barrel for their Glock.

Rob96

Where can I find more info on the "flaking tennifer finish"? I'd like to look into that too. Does it have descriptions on what it looks like or how to prevent it from happening more?

It's in the bore and when I rub a small dental pic over it it's super rough and I'm sure it doesn't help in the accuracy dept. It's still more accurate than I, but the fact that I know it's in there bothers me.

Thanks for the input guys if you have anymore I'm still listening....

Ross T.
 
Thanks Rob96

I went into the seach mode under General Glocking and did two searches. 1 was "barrel pitting" got 4 hits but could only link up to 1 of them. It said it was a bad url and the pages didn't exist. The one I could link didn't have the info I was looking for.

The second one was for "tenifer flaking" got one hit and still a bad url or page doesn't exist message.

Any advice Rob96? I left some comments in the guestbook to let them know I was having some probs with their search function.

Thanks again
Ross T.
 
Tenifer shouldn't flake off. If it does, then you have a defective barrel. I fired over 20,000 rounds through my original Glock 21, before I blew it up, playing with .400 Cor-Bon. Still have the original barrel, and there are no pits.

Supposedly, tenifer is second hardest substance to diamonds.
 
And there you have it from Walt from Glock Talk. I also own a G22 and have no sign of this pitting, so either way if it is said to be normal or not I would still call Glock.
 
Like most coatings,I suppose, it depends upon preparation of the surfaces specially for special coatings.
Sounds like a warranty problem to me too.
 
I know a couple of people who had the same problem with their Glocks, it stopped when they changed their dishwasher detergent. (MarkCo- I just had to say that)
 
I have a G23 Barrel with over 2000 rds through it and I still have the "tenifer flaking". I have quite a few glocks and never had this problem. It is actual pitting that follows the rifling. It is in spots all the way down the barrel. Not in the "grooves" at all just on the raised part of the polygonal barrel. I wish there was an answer to this because it really bothers me, but it shoots accurately and I don't want a barrel that doesn't have a matching SN#. Hope this helps.

Brian
 
I have four Glocks, and none of them have any pitting, or anything that looks like pitting, in the barrels. Two were purchased used, and I know the G21 has a few thousand rounds downrange, and the barrel looks like new.
 
This is not pitting ...

What you see is most likely the black oxide finish wearing off inside the barrel or excess material due to the Tenifer process.

The temperatures neccessary to apply the Tenifer are high -- about 600+ degrees -- during which some excess Tenifer may brittilize -- not all of it, and NOT the barrel steel -- but a fine, micro-layer of Tenifer brittilization. Beneath this brittilized excess, the Tenifer does penetrate into the steel of the barrel and provides the same protection as barrels with no excess brittilized Tenifer. Glock can produce barrels with consecutive serial numbers, and one barrel will show some brittlizing of excess Tenifer and the very next barrel will not.

Since the application of the Tenifer coating does not interfere with the integrity of the steel in the barrel (no stress-related problems), Glock Inc. does not consider this a defect. Nor have they done much to find out why this event occurs. Glock considers this problem purely cosmetic in nature, which has no effect on the accuracy or the integrity of the barrel. This excess Tenifer usually disappears somewhere around 1,200 - 2,000 rounds. Then the "pitting" will stop or disappear, and only the Tenifer which bonds to the steel will remain.

If this "pitting" still bothers you, call Glock's Warranty Dept. They'll tell you to send your pistol back to Smyrna with a detailed letter describing the pitting that you see. They'll probably tell you what I just said above and then offer to replace your barrel if you want. However, the replacement barrel's serial number will not match. My advice is to just ignore it. It will go away eventually.
 
I have the same problem with my glock 22 and 27. The 22 has about 3000 rounds through it and the 27 has around 1000 rounds through it. I tried Butch's Bore shine, shooter's choice, sweets, hoppes, tetra, mp7, remington bore cleaner, and jb compound. I like the 27, but the 22 is going to go since I got a USP.
 
Glock Barrel Pitting

First of all, I really like Glocks and have personally owned 4 (19, 23, 27 & currently the 35). My mod.35 was my competition gun which ate a steady diet of Rainier Complete Metal Jacketed(really plated ) of about 2000 rds and 1000 rds of Moly coated 180 gr. lead bullets ( nice in that cleaning was a snap). When I made the transition back to CMJ by Rainier I noticed a groove 1" long, crooked & between two raised hexagonal areas and about 1-2mm deep. I had no idea who it got there since I was pretty adamant about cleaning this baby. I ended up doing the ultra clean w/ the electro chemical method and even JB bore paste and realized this was a serious groove. Glocks answer is that from time to time the barrel manufacturing allows "...pockets..."(of air or other impurities during the forging that find their way out after some wear. Their answer was to collect the pistol and install a new barrel and send it back. I could have waited a couple of months for them to match the barrel to the frame number but I wanted a fully suppported barrel instead so it took the new barrel and moved on. I have to admit this was disappointing but
they did replace it without a problem. I now have a KKM barrel that gives me spent brass loaded to major that fits into a case gauge after use and is exceptionally reliable. Good luck
Cutter
 
You must log in or register to reply here.
Back
Top