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AR15.COM
9/6/2010 12:15:18 PM EDT
How do you tell if you have a US made Colt or a Canadian? Here is the markings... It also has the M4 above the gas tube.

9/6/2010 1:59:18 PM EDT
[#1]
I believe (but I'm not sure) that Canadian Colts will have the stylized "D" Diemaco marking.
9/6/2010 3:15:34 PM EDT
[#2]
Colt USA.

Hybrid rifles have a Colt USA lower with a D symbol on the upper near the C.  

Colt Canada rifles say Colt Canada on the lower. D on the upper and bolt carrier.   My S/N on my Canadian Colt says LEC........ My S/N on my Colt USA gun says LE........  Both are 6920's.

My Colt Canada gun is the nicest Colt AR ever.




9/6/2010 4:18:33 PM EDT
[#3]

My Canadian upper shown with the Diemaco stylized letter D marking instead of the US made letter C




Here's a clear graphics of Diemaco logo (now Colt Canada)


Quoted:
How do you tell if you have a US made Colt or a Canadian? Here is the markings... It also has the M4 above the gas tube.

http://i606.photobucket.com/albums/tt145/MJC345/IMG_0617.jpg

The upper in the picture above is my Colt 6721 with the stylized D (Diemaco) forge marking, the marking to the right of it is the actual forging factory which looks like a splintered letter A which stands for Anchor-Harvey forging.

I also have a new 6721 upper exactly the same as yours with a letter C which is a US made Colt, the marking to the right of it is the keyhole symbol which is from Cerro Metal forge, my carbine was made in 5/ 09.


9/6/2010 4:50:19 PM EDT
[#4]
Quoted:
How do you tell if you have a US made Colt or a Canadian? Here is the markings... It also has the M4 above the gas tube.

http://i606.photobucket.com/albums/tt145/MJC345/IMG_0617.jpg





it will have a D or say  made in canada

unless its a police trade in, it wont be made in canada anyway. just a few parts.
9/6/2010 5:17:13 PM EDT
[#5]
It also has a cool little proof mark to the upper right of the ejection port.