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Posted: 5/20/2005 5:14:57 PM EST
An anodizer for the government does the following mil spec treatments and I would like to know which is used on the AR15 if any:
MIL-A_8625 Type II
AMS-QQ-P-35
ASTM A-967
MIL-A-8625 Type III
MIL-STD-171
MIL-C-26074
MIL-C-5541
AMS 2469
ASTM B733-97
Link Posted: 5/20/2005 7:16:50 PM EST
[Last Edit: 5/20/2005 7:20:10 PM EST by fight4yourrights]

Originally Posted By ChuckD:

An anodizer for the government does the following mil spec treatments and I would like to know which is used on the AR15 if any:


MIL-A_8625 Type II sulphuric bath

AMS-QQ-P-35 not technically a "mil" spec

ASTM A-967 not technically a "mil" spec

MIL-A-8625 Type III hard coating I'm guessing the gov't specs this on M16's

MIL-STD-171 haven't seen this

MIL-C-26074 this is an electroless nickel coating - good for electrical conductivity

MIL-C-5541 this is a "alodine" coating - good for primer or electrical conductivity

AMS 2469 not technically a "mil" spec

ASTM B733-97 not technically a "mil" spec




Bushmaster uses a "hard anodize finish with a nickel acetate final seal coat"


BTW - be sure you specify "black dye"
Link Posted: 5/22/2005 12:16:26 PM EST
The old original gray was milspec 8625. I don't know about the black.
Link Posted: 5/23/2005 5:58:39 PM EST
The old aluminum hardcoat Mil-Spec (MIL-C-60536) was dropped in 1985 according to this document, and the current hardcoat Mil-Spec (MIL-A-8625, Type III) was adopted in its place. The gray finish on Colt M16s and M16A1s was a heat curing dry film lubricant called Sandstrom 9A.
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