[marktwain]

My retired Marine friend said his brownish lower was an XM16.

Thank you for your very informative post.

Exactly the type of expertise that freerepublic is justly famous for attracting.

[archy]

Thank you for your very informative post.

I try. The more info supplied or the better or more detailed the pics, the better the likelihood that I can at least come up with a logical or reasonable analysis or observation. Which does not necessarily mean it's correct.