Various AR15 Finishes

[lamarbrog]

Does anyone know of a list of which manufacturers use which type of finish on their receivers?

I've noted three different types in my experience. A matte gray anodizing which doesn't seem to be used anymore (early 1990's Colt rifles), a matte black anodizing (seen on High Standard and Interarms), and some receivers seem to have a very high-gloss teflon coating (CMMG, Double Star).

Who is using what? When ordering parts, it would help to know what finish is used by different companies to better match appearance when building a rifle from parts of differing sources.

Thanks.

[lamarbrog]

I'll post pictures of what I currently have in my possession.

CMMG upper on a DoubleStar lower.
http://i72.photobucket.com/albums/i190/Lamarbrog/DSCN0707.jpg

Interarms upper on a DoubleStar lower.
http://i72.photobucket.com/albums/i190/Lamarbrog/DSCN0705.jpg

CMMG upper on a Interarms lower. (It doesn't look the least bit rusty in person... no idea why it does in the picture.)
http://i72.photobucket.com/albums/i190/Lamarbrog/DSCN0704.jpg

On top: Interarms upper and lower. On bottom: CMMG upper, DoubleStar lower.
http://i72.photobucket.com/albums/i190/Lamarbrog/DSCN0701.jpg

I'm trying to figure out who makes uppers and lower that match the Interarms, I like the flat black without the glossy Teflon.