Found an A3 carry handle at a gun show and the price is good. It has markings I have not seen before. Appears to be an outline of a "mountain peak" or "summit". First thoughts were Rock River Arms, but I haven't seen one of theirs before. The seller wasn't sure either because he had the same models on both a Rock River upper and a Bushmaster upper. Anybody got an I.D. on this one? Thanks.

I suspect the emblem was actually the A H (tiny A over an H that widens from top to the bottom), which is the ID of the forge that produced the raw forging, Anchor Harvey.  It tells you nothing about who made the piece, because all the major manufacturers have used Anchor Harvey forgings at one time or another.

I know the one you're talking about...I had a Diamaco-Colt upper with it . Not the same emblem. This was not a letter, number or combination of the two that you typically see on Colts  or Bushmasters. Picture a snowy summit's outline. That's what it looked like.

Did it look like this?

If so go to this thread.
www.ar15.com/forums/topic.html?b=3&f=118&t=205429

Just be careful.... China/Taiwan is making carry handles now, and they are definitely lower priced, and sub-standard quality to US made ones.