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AR15.COM
6/2/2009 6:57:20 PM EDT
I picked up (4) 42 round mags and when I handle them they leave black gook on my fingers. I emailed [email protected] and here's the response I got:

These have a cosmoline like finish that will leave a black
residue until wiped off.
CMMG, Inc
PO Box 369
Fayette, MO 65248
(660)248-2293
(660)248-2290 (FAX)
www.cmmginc.com


Cosmoline is not a finish, it is a preservative that looks nothing like the black stuff coming off the mags. I read on the magazine section of the tech forums that there is an issue with the finish. Please advise.
6/2/2009 7:27:53 PM EDT
[#1]
The black that is coming off on your hands is a normal.  It is similar to cosmoline.  
We had a contaminate in our first run that resulted in splotchy bare metal.  To the best of our knowledge these were all exchanged out.