[ARCHIVED THREAD] - Colt AR15 Production Code Stamps???

Posted: 12/20/2007 5:02:24 PM EDT

Is there a chart of all of the Colt AR15 Production Code Stamps (the symbols on the upper receiver such as the square, the keyhole, the anchor, the cardinal forge etc, and any other info?

Are the stampings only an indicator of where the receivers were made?

Do the stamps have to match and or is one considered better than the other?

Any info is appreciated.
Thank you.

Posted: 12/21/2007 6:27:15 AM EDT

[#1]

Bump*

Posted: 12/21/2007 6:29:38 AM EDT

[#2]

Good question

My carry handle has the square mark, i believe it is CMMG but not sure. My upper receiver has the keyhole mark.

Posted: 12/21/2007 7:26:03 AM EDT

[#3]

I thought that there was a chart or something, but have been unable to locate it unfortunately.

Posted: 12/21/2007 7:38:54 AM EDT

[#4]

The only one I know of is on Bigger Hammer.net

Posted: 12/21/2007 7:45:06 AM EDT

[#5]

Thanks, I have seen that one and its good, but I thought that there was one that also showed the other markings such as the keyhole, square and other symbols and some information about them as well.

Posted: 12/21/2007 7:51:32 AM EDT

[#6]

The forge markings on uppers, in general, do NOT tell you who made the upper; only who made the raw forging that someone else took and made into a finished piece.

There are exceptions to this. Both Cplt and FN have individual markings (C and F) along with the forge marks. Armalite I believe also has a distinct mark on their uppers, and Rock River has recently started marking their uppers; though I have two RR uppers from a few years back that only show the forge mark.

Posted: 12/21/2007 8:10:18 AM EDT

[#7]

Here are a few, all from Colt rifles.