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AR15.COM
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9/22/2007 6:24:33 PM EDT
Here is the challenge.....
I have 3 M16 barrels.
I want them to go on 3 DIFFERENT clones.
They are the early barrels marked with a 12 out by the muzzle, M VP between the sight base.

So, did these come on anything other than the 602?
9/22/2007 6:31:21 PM EDT
[#1]
603 and 604
9/22/2007 6:31:58 PM EDT
[#2]
According to Ekie's guide, early 603/E1's and 604's. That marking was used up until '66 and the 603/604 came to be in '64.
9/22/2007 6:42:15 PM EDT
[#3]
I thought the 603-604 had the MP mark

ETA: I think I get it.............all models had this in 1963-1964, then they switched to MP?
9/22/2007 7:36:11 PM EDT
[#4]

Quoted:
...all models had this in 1963-1964, then they switched to MP?


And 65-66. The switch to "MP" was in 66.
9/22/2007 7:51:16 PM EDT
[#5]
I'm a retard. Reading is fundamental...........

Thanks guys, I think I have it now 64-66.

Do you guys see a lot of these in circulation? I have had tons of barrels, but not these.

I've been saving these ones for a while. When I first got them I thought it was a "W" stamped barrel and almost crapped myself (M upside down). Then I saw the "12" by the muzzle.
9/23/2007 4:12:38 PM EDT
[#6]
I ran across 4 out of all  uppers I went through and they were all in this last batch , Guess I really should have saved 1 for myself
9/23/2007 10:01:30 PM EDT
[#7]
You could chop one and make a 605
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