magpul 20rnd burn holes?

[dentron]

I bought these 20 round magpuls used and didnt notice these marks until i got them home. They look like burn holes and are all in the same spot. I'm just wondering if anyone has seen this before and knows what caused it. They dont go completely through so i dont think it will affect function, i just think its weird they're all in the same spot.

http://i86.photobucket.com/albums/k99/kruel-t/20130109_183218.jpghttp://i86.photobucket.com/albums/k99/kruel-t/20130109_183228.jpg

[dentron]

http://i86.photobucket.com/albums/k99/kruel-t/20130109_183158.jpghttp://i86.photobucket.com/albums/k99/kruel-t/20130109_183403.jpg

[m1A]

I have a few of those that I bought a couple years ago. I checked them and they have the exact same marks. I never noticed it before. They have never given me any problems.

[brushy bill]

I always took these to be mold marks. Nothing to worry about.

[romadant]

Bought some not too long ago and they have the same marks. No problems with them so far. I think it might just be a sloppy burn off, where they break the mold.

[Iraqgunz]

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