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Thread: Powder Springs M10 Upper with Adjustable Sight - What manufacture year?

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    Powder Springs M10 Upper with Adjustable Sight - What manufacture year?

    I was lucky to find an M10 Powder Springs Upper in 9mm It was complete and had the early Powder Springs Set-Screw Adjustable Sight.

    I've read these adj. sight versions were among the earliest of M-10s
    Would that be late 1970 or 71 or later?

    I'm just curious I've done a search and can find no definitive dates - just "early" guns had this as an option that was quickly phased out.

  2. #2
    Registered User Deerhurst's Avatar
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    It'll be a very early gun.

    PM me a SN and I can look in The Mac Man book and try to find a year.

    1- means 45acp

    The next number will indicate year of MFG.

    My M10 is a 1-3 which is a 1973 manufacure 45ACP.

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    Wheres R like Button....?

    Good info on a very early gun

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    My actual MAC gun is also a 1973 45 Gun with an original can. 1-3 006xx SN.

    The 9mm Upper with the adjustable sight was part of an estate I recently acquired. Unfortunately just a nice upper by itself. No serial#.

    I would have preferred a complete transferable but was glad to get this. It will make a nice conversion kit for my Powder Springs 45 MAC. I just wanted to better understand the dates of Mfr for these sight variants.

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    Registered User timkel's Avatar
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    Pics would help. What is the location of the barrel pin? Is it above the barrel or below?

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    Quote Originally Posted by timkel View Post
    Pics would help. What is the location of the barrel pin? Is it above the barrel or below?
    The pin for barrel is located on top (above) side of the barrel . Will try to get some pics loaded.

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    Registered User Deerhurst's Avatar
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    Quote Originally Posted by timkel View Post
    Pics would help. What is the location of the barrel pin? Is it above the barrel or below?
    It'll be above the barrel.

    With the adjustable aight it'll be early Military Armorment Corp production. Probably within the first year of the company. I'll have to go back and see what is in the book.

  8. #8
    Registered User timkel's Avatar
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    Pin above barrel = pre-auction early upper
    Pin below barrel or no pin = later post auction, RPB, ect

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    I think these uppers also used the grooved style pin and spring-loaded retaining catch.

  10. #10
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    From my notes I think the adjustable front sight was stopped around 1972. Serial number range 1-300xxx, 2-3000xxx, 3-3000xxx. Having said that, we all know you can find anything with these guns.

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