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12/11/2018 1:58:31 AM
11/9/2018 9:21:38 PM
Posted: 3/6/2005 12:26:35 PM EST
A friend of mine is contemplating selling a complete A2 postban upper. He has long lost the original paperwork and is unsure of the manufacturer. There is what looks like a letter "A" on the RH side of the carry handle, just forward of the rear sight slide. Any idea who the manufacturer is?

Also, this A2 upper has a "8/3" elevation wheel. This is a 16.5" barrel. Shouldn't the sight be "6/3"?

Thanks for your help.
Link Posted: 3/6/2005 12:29:00 PM EST
[Last Edit: 3/6/2005 12:29:21 PM EST by mongo001]
A2 upper receivers come with the 8/3 elevation index, regardless of the barrel length. Only the carry handles come with the 6/3 elevation indexes.

I've seen the "A" marked A2 upper receivers on Bushmaster and RRA recently. Olympic used to use the mark also, but I haven't seen one in a long time. The last time I saw one on an Olympic, it was an A1 receiver.
Link Posted: 3/9/2005 5:46:22 AM EST
Alcoa made the upper
Link Posted: 3/9/2005 5:55:31 AM EST
[Last Edit: 3/9/2005 5:58:18 AM EST by mongo001]

Originally Posted By Melvin:
Alcoa made the upper



Nope. The Colt Alcoa Forge uppers are marked "C AF". The splintered "A" forgings are Anchor Harvey. These raw forgings are supplied to many manufacturers, who finish them, as stated about 1000 times to date.

Anchor Harvey Home Page - notice anything familiar in that company logo?

Added a pic:

Link Posted: 3/9/2005 6:10:15 AM EST
I have recently seen the splintered A on a Colt upper, so Colt uses them too.
Link Posted: 3/9/2005 6:14:24 AM EST
great info. learn something new everyday. thanks
Link Posted: 3/9/2005 6:15:54 AM EST

Originally Posted By Melvin:
great info. learn something new everyday. thanks



BiggerHammer's info is extremely dated, but it is a good historical foundation.

BiggerHammer
Link Posted: 3/9/2005 6:24:15 AM EST
Has anyone noticed any quality differences between the splintered A, keyhole, and unmarked uppers? Im guessing any quality differences would be produced by the AR companies final machining of the aluminum forging rather than the company who produced the forging?
Link Posted: 3/9/2005 6:26:51 AM EST

Originally Posted By candt:
Has anyone noticed any quality differences between the splintered A, keyhole, and unmarked uppers? Im guessing any quality differences would be produced by the AR companies final machining of the aluminum forging rather than the company who produced the forging?



I'm betting it's just luck of the draw, but I've had better luck with the "A" marked and keyhole marked receivers than the unmarked ones.
Link Posted: 3/13/2005 6:40:46 AM EST
Thank you all for the information. I needed to clarify before I posted this complete upper on the EE...
Enjoy life...
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