IDing AR barrel.

**Anzac15** · 03-03-2015 10:12 PM

Got an upper in a trade the other day, no idea of the make. The barrel is the puzzler, though. It is an A2 type heavy barrel, and is completely devoid of any markings. Looked it over again tonight, and found one 'M' under the gas tube. Any ideas??

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**Highly Recommended** · 03-03-2015 10:12 PM

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**Bill Hollinger** · 03-07-2015 04:41 PM

Unfortunately there is no sure way of determining the manufacturer of such a barrel.

**Midmichigun** · 03-24-2015 10:07 PM

Any markings on the front sight base?

**Vincent** · 03-29-2015 09:15 PM

The first AR15, the Colt - ArmaLite 601 had an "M" stamped on the barrel. The barrels were made by Winchester IIRC.

**browningautorifle** · 03-29-2015 09:38 PM

Originally Posted by Vincent

ArmaLite 601 had an "M" stamped on the barrel. The barrels were made by Winchester IIRC.

Interesting...

**RCS** · 03-30-2015 09:03 PM

why don't you check the twist ? could be 1x14, 1x12, 1x9 or 1x7. by checking the twist you might have an idea of the time period

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