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Posted: 2/5/2002 3:29:46 PM EDT
It is a preban upper with a 16" barrel. The seller believes it is a Colt upper because he bought it with some other Colt parts but he is not absolutely sure. Ther is a "M" stamped in front of the rear peep site and on the barrel it is stamped with a "SS" and "5.56", it also has a 5" flash supressor and bayonet lug. It is a complete upper with bolt carrier, charging handle, etc. My questions are:
How can I tell if this is a Colt upper?
What do you think this is worth?
Would this be a chrome lined barrel?
What would the twist be on this barrel?
Any information would be greatly appreciated!
Thanks!
Link Posted: 2/5/2002 3:55:02 PM EDT
Sounds like an Olympic Arms barrel to me.

They mark their stainless barrels with "SS 5.56"

Colt will be "CMP" then other info on the bbl... but the 11" w 5.5" FH didn't have any markings on them, I think.

Here are some good resources:

www.biggerhammer.net/ar15/uppers/

and

www.biggerhammer.net/ar15/barrelsbolts/

on Colt markings.

A complete working upper with bolt/carrier is worth prolly around $300 to $350, and more if it was a Colt.

I do not think it is chrome lined, since "SS" tells me it's stainless steel.

Who knows what the twist might be....

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