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AR15.COM
8/27/2008 9:00:05 PM EDT
I have a well-shot Commander that I bought a while back and noticed something on the locking lug area of the barrel a month or two ago. In the lighting, it appeared to have a series of 3 cracks (one inside each groove of the lugs) and one in front of the lugs. In direct lighting, they look more like scratches (silver, not black) but they can be felt with a fingernail. This was the best I could do with a 3.1 megapixel phone cam's macro lens, but the scratches/cracks are visible. What do you think? Are they scratches or cracks? Long term concern? Immediate concern? No concern?








8/27/2008 9:13:31 PM EDT
[#1]
1st
8/27/2008 10:54:54 PM EDT
[#2]


GD------>
8/27/2008 11:32:38 PM EDT
[#3]
You know, it's just really hard to tell in the pics.  My first impression is that they're scratches.  Maybe polish down one of 'em and see if it buffs out.  That might tell you if it was a scratch or not.

Maybe a more experienced 'smith or aficcionado can say whether they're prone to crack there or not.........

Might post this in the gunsmithing forum also.
8/28/2008 2:45:04 AM EDT
[#4]
I can't really tell where the cracks are,but maybe it's one of those 2 piece barrels? Either way,I would just change out the barrel.
8/28/2008 2:58:13 AM EDT
[#5]
Could be tooling marks could be scratches, or could be cracks, I can't tell from the pics.
8/28/2008 8:28:11 AM EDT
[#6]
If you're that concerned, why don't you have it dye-pen'd or magnafluxed?
8/28/2008 9:09:34 AM EDT
[#7]
The marks on the barrel were caused by the edge of the file that was used to break the corners of the locking lugs.
8/28/2008 9:17:12 AM EDT
[#8]

Quoted:
The marks on the barrel were caused by the edge of the file that was used to break the corners of the locking lugs.


Yup, I do believe so.
8/28/2008 10:59:43 AM EDT
[#9]

Quoted:

Quoted:
The marks on the barrel were caused by the edge of the file that was used to break the corners of the locking lugs.


Yup, I do believe so.


+1
8/28/2008 1:34:01 PM EDT
[#10]

Quoted:

Quoted:

Quoted:
The marks on the barrel were caused by the edge of the file that was used to break the corners of the locking lugs.


Yup, I do believe so.


+1




.................... no one with half a brain is going to disagree with he who knows.
8/28/2008 1:52:58 PM EDT
[#11]

Quoted:

Quoted:

Quoted:

Quoted:
The marks on the barrel were caused by the edge of the file that was used to break the corners of the locking lugs.


Yup, I do believe so.


+1




.................... no one with half a brain is going to disagree with he who knows.


When a man's right he's right!
8/28/2008 4:33:30 PM EDT
[#12]

Quoted:

Quoted:

Quoted:

Quoted:

Quoted:
The marks on the barrel were caused by the edge of the file that was used to break the corners of the locking lugs.


Yup, I do believe so.


+1




.................... no one with half a brain is going to disagree with he who knows.


When a man's right he's right!


So we were all worried for nothin? Well, I knew one of you guys "in the know" would set it straight.  That's good to know what marks like that can come from.  I was aware of the procedure for using a file to break that edge, but one should use ones thumb or something as a guide.  Sloppy 'smithin'!
8/28/2008 10:50:29 PM EDT
[#13]
Thanks everybody, particularly that person who one would be foolish to disagree with.