Anyone heard of CMMG.

[USMC88-93]

Its hardly the best, it is more likely the company they could afford to be a stocking dealer for. I have no experience with their lowers but the uppers I have seen have been ok.

Here is their forum on AR15.com
http://www.ar15.com/forums/forum.html?b=2&f=145


I take it the Gun Room has devoted a section to black rifles? Or is this in their used consignment section?

You will need to have some idea what you are looking for.
1. Barrel twist 1/7, 1/9, etc....
2. Chrome lined bore?
3. Commercial or Milspec buffer tube?
4. Type of barrel steel 4150, 4140?
5. Any number of other questions you might ask which in truth might be unnecessary but nice to know.