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I brought this up to the Colt reps at SHOT 2006 (why don't Colt use cold hammer forged barrels, ferritic nitrocarburization, gas pistons, etc., to shut down the complaints against Colt - and by default HK Defense). I was told that the barrels are used interchangeably depending on availability. How true this is I do not know. I do suspect that during the horrible run-up to the last election and for several months afterward parts WERE used interchangeably. Just a guess; assuming the info I was provided in '06 was correct at all.
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I recently bought one of those "Canadian" Colts with my Colt Armorer's discount. During the Colt Armorer Course the Colt rep said that the Canadian 6920s had hammer forged barrels and that was the only real difference between the American and Canadian Colts.
That being said; my training and experience tells me that hammer forged and chrome lined barrels are the way to go! I'm not sure about collect-ability of the guns (I don't collect guns, I shoot them), but my Canadian built Colt is a nice rifle. I have 2 other Colt M4s and I can not detect any difference in quality between them.
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I just picked up an unfired 6920 manufactured in 07. The weird thing about it is the BCG and the upper receiver has the Diameco sylized "D" in place of the "C". Everything else, including the barrel, looks U.S. made. I'm trying to figure this one out.
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My Colt 6920 had a Diemaco upper right from the factory, and it was a US weapon. Also seen loose
Diemaco BCGs for sale at local shows. Going to guess that Colt may have brought in numbers of
these parts to augment their own production from time to time, as there was a need.
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I was getting worried. I thought I may have gotten ripped off, but I guess not. Talk about stressing!
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my 07 made 6920 upper is stamped Diemaco....ALSO which I havent heard anyone say in this thread ...on the upper just above my barrel nut but below the picatinny rail its stamped "M4"...So I just assumed that my 6920 was made in the same plant with the military M4's because of the "M4" marking and the Military Bolt carrier.
I too would like to know the low down as I was under the impression that (form talking to Colt ) "all U.S. made rifles were civilian made rifles and the Canada made rifles ...Military rifles were made on one side of the plant and LE on the other side "
So I am confused.... :confused: absolute clarification would be MUCH appreciated.
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My department ended up with 3 6921's made in Canada. The color on the upper and lower is more gray/green, the shape of the grip is just a little bit different. The handgards and stock look just like US made. Barrel, bolt and carrier are marked "D" vs. "C".
6921 = Semi only 14.5 inch M4.
Here are some pics.
http://www.hunt101.com/data/548/medium/Untitled_013.jpg
http://www.hunt101.com/data/548/medium/Untitled_008.jpg
http://www.hunt101.com/data/548/medium/Untitled_011.jpg
http://www.hunt101.com/data/548/medium/Untitled_012.jpg
http://www.hunt101.com/data/548/medium/Untitled_009.jpg
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The engraving on that lower is just a smidge thinner than what I have on my US M4LE, and is totally
consistent with what was on my Canadian 6920LE from a while back. I'm willing to bet that you'll
also find some subtle differences in the machining patterns with a contemporary US lower.