I have a 10.5" barreled A2 upper with the 5.5" suppressor.  There are NO marking of any kind on it.  The guy I got it from said he thought it was an older Armalite perhaps.  I can't find any ID marks at all except for the caliber markings on the barrel itself.  Any ideas?  It doesn't seem to be of any great quality.  You can see the finish is a bit lighter than the just-barely pre-ban 1994 Colt Sporter lower that it's on now, and it also has a slightly green tinge to it.  As a side note, my OKay 30 rounders do not like seating properly at all with this upper when they're loaded.  I have to REALLY slap the mags upward to seat, yet all of my older Adventurline and Colt 20 rounders seat just fine.
http://www.fototime.com/2AE35B46CF6565B/standard.jpg
http://www.fototime.com/F2BF9DD249B118D/standard.jpg
http://www.fototime.com/5BD8B36FC8D7E21/standard.jpg

Looks like bushmaster to me but its hard to say for sure

Quoted: Looks like bushmaster to me but its hard to say for sure

i have never seen a bushmaster xm/comando upper that had the rings at the base of the flashhider.


all the ones i have seen from bm are smooth and their uppers are much darker than that. also their bbls. are marked b mp c






close ups of the barrel markings would help.   the bbls i have seen with only caliber markings are model1 or m&a, forget which it was

looks like a DPMS 5.5 flashhider

i had an Olympic upper that looked very, very similar.

just checked there website and i think you have an Olympic K3B upper
http://www.olyarms.com/?page=m1_k3b#

Yep;  Its any Oly.  Have one just like it.