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9/19/2017 7:27:10 PM
Posted: 12/28/2005 1:25:03 PM EDT
I have an AR-15 in standard A2 configuration the lower is all Rock River but the upper I got at a gun show, it was labled as Rock River with Colt Barrel, I know the barrel is Colt because it says C MP 5.56 NATO 1/7, it is government profile in standard no ban configuration bayonet lug, and A2 Flash Suppressor, but I'm haveing trouble identifieing the front sights there marked with what appears to be a Diamond with a B with an underflined 5 next to it inside, has anyone seen this one before, also the front handgaurd retainer appears to be triangular is this normal?.... The barrel is undated....
Link Posted: 12/28/2005 1:28:31 PM EDT
[Last Edit: 12/28/2005 1:28:41 PM EDT by eklikwhoa]
Link Posted: 12/28/2005 3:59:27 PM EDT
Camera is put away right now, I could try getting some pictures tomorrow....
Link Posted: 12/28/2005 4:00:57 PM EDT
bushy bbls can be marked like that too, so that by itself does not mean its a colt
Link Posted: 12/28/2005 6:59:18 PM EDT
[Last Edit: 12/28/2005 7:01:07 PM EDT by Gregory_K]
C MP is one of the markings Colt uses

B MP is a bushmaster marking.

FSB should have a "C" or a "F" on it.

my m16a1 and m16a2 (uppers only) FSB are marked "C"
m16a1 barrel "chrome bore"
m16a2 barrel "C MP 1/7"

6721 FSB is marked "F"
6721 barrel "C MP 1/9" might HBAR as well.
there all in the safe and I am to lazy to look going from memory here.

from what I recall 20" barrels have the triangle while the 16" has the round handguard cap
Link Posted: 12/28/2005 7:08:34 PM EDT
My Colt 6920 FSB is marked with a diamond and a 2 as well as the F marking on the opposite side. My LMT FSB is marked with a diamond and a 2, but no F on the opposite side.
Link Posted: 12/28/2005 7:20:55 PM EDT
Havn't gotten the camera out yet but heres a quit MS Paint of what the mark on the FSB sorta looks like, it's hard to see, and I'm not 100% sure what is next to the B, but it looks most like this I think....

Link Posted: 12/28/2005 8:15:45 PM EDT
yup, you're right, read it too fast....
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