[ARCHIVED THREAD] - A-1 upper origin

Posted: 7/10/2004 1:59:26 PM EDT

does anyone here know the origin of the A-1 uppers with the letters "P M" forged into

the well at the rear of the carry handle ?? these were fairly common at gun shows back

in the eighties. heard a rumor years ago that they were associated with hydramatic

M-16A1 production, but this was never proven. thanks !!!! jaygee

Posted: 7/10/2004 3:12:01 PM EDT

[#1]

I had two like this on Oly's.

Posted: 7/11/2004 6:04:49 AM EDT

[#2]

I have one,but no clue who made it.

Posted: 7/11/2004 6:21:40 AM EDT

[#3]

Manufacturer of the forging, and manufacturer of the finished upper are two differen things. The forging marks are probably available on many different company receivers that are not the one you want.

That being said, I'll keep an eye open for you.

Posted: 7/11/2004 10:42:17 AM EDT

[#4]

Than sounds like it might be a Capco, Inc./ Martin Marietta upper. The first letter would designate the company that did the machining and the second letter would be the company that made the raw forging.

Posted: 7/11/2004 12:18:56 PM EDT

[#5]

Quoted:
Than sounds like it might be a Capco, Inc./ Martin Marietta upper. The first letter would designate the company that did the machining and the second letter would be the company that made the raw forging.

Another vote for Capco, Inc./ Martin Marietta upper... looking at the upper receiver forging codes on page 296 and 297 of "The Black Rifle II" right now.

On page 290 there's a pic of a "PM" upper and the book states: "At the insistence of the Army, a manual bolt closure device was added to the M16, changing the designation first to XM16E1 and then, upon adoption on February 28, 1967, to M16A1... <snip> ... This upper was utilized until the adoption of the M16A2 service rifle in November, 1983".

Sounds like surplus uppers hitting the market.

[ARCHIVED THREAD] - A-1 upper origin

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[ARCHIVED THREAD] - A-1 upper origin

[ARCHIVED THREAD] - A-1 upper origin