MP5 A3 Stocks: Buyers Guide? - Page 3
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Thread: MP5 A3 Stocks: Buyers Guide?

  1. #21
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    Quote Originally Posted by shad951 View Post
    This seems like a really good buy. Are all factory A3 F stocks 2 position stocks?
    I have seen some 4 positions, however I can't say for sure if they were "factory notches" or cut into a 2 position and refinished.
    Last edited by rickj1nd; 11-27-2018 at 12:30 AM.

  2. #22
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    Quote Originally Posted by rickj1nd View Post
    I have seen some 4 positions, however I can't say for sure if they were "factory notches" or cut into a 2 position and refinished.
    Good to know. Thanks for the update!

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    This was very helpful as I have been so confused on which A3 stock. Thanks

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  5. #24
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    Quote Originally Posted by Mr.Maim View Post
    Oh definitely, the ones I've purchased in the past few years were also new in bags with HK labels.

    The stocks from Numrich, you can be assured are Genuine HK. Them and IMA-USA are the gold standard for surplus firearm parts.
    I ordered one of these from Numrich just recently and it came in a clear plastic bag. No HK markings at all and no date codes which I see from this thread are no longer relevant. However my concern is it does not fit properly on my PCS full size clone properly. Push pin is very tight getting through second hole in receiver no matter how many times I have tried adjusting the stock to make sure it is fully seated to receiver. I have to use rubber mallet to tap pin in or out. Anybody else have issues with this stock and push pins? Wondering if I should return the stock since it just came in a plastic bag with no HK markings.

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    Quote Originally Posted by rickj1nd View Post
    I have seen some 4 positions, however I can't say for sure if they were "factory notches" or cut into a 2 position and refinished.
    Yes HK does make A3 "F" stocks with 4 position from the factory: https://www.hkparts.net/shop/pc/MP5-...on-5p17614.htm

    Quote Originally Posted by RegularGuy461969
    When did the F come into production?
    1999 according to this article: http://www.smallarmsreview.com/displ...darticles=3114

    What I'd like to find out instead is when the 4 position stocks were first introduced if anybody knows?
    Last edited by DDC-04; 02-10-2019 at 12:39 PM.

  7. #26
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    There have been a variety of changes to the MP5 A3 stocks over the years. To the best of my knowledge, none of them had a convex shape to the butt plate. Even the prototype MP 64 had a concave shape.

    MP5 A3 Stocks: Buyers Guide?-265.jpg

    MP5 A3 Stocks: Buyers Guide?-264.jpg

    One of the earlier A3 stocks had an all metal receiver end cap. Then, HK switched to a metal end cap where the rear portion of the end cap was plastic. HK also came out with a "universal" buttstock that had slightly longer forks and the bolt hold open cutout. This was intended to be used on both the .223 guns as well as the MP5 series. On an MP5, the longer forks would not let the stock fully retract. HK produced both the earlier A3 and subsequent "F" stocks with, and without a bolt hold open cutout. Then there is the multi position F stocks. Actually never had one of those, I have too many A3s as it is. There may be more versions, but that's all that come to mind.
    Last edited by SudS; 02-10-2019 at 03:03 PM.

  8. #27
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    outstanding info
    -God created man, Sam Colt made them even, and then HK screwed up the odds-

  9. #28
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    On the universal stock, how would they work with the .223 if it has an H buffer? Buffered carrier or do you change out the H buffer?

    Also, this seems like a good deal considering recent prices. Not mine and no affiliation. Description clarifies it is not air soft and seems to have purchased from HKParts.

    https://rover.ebay.com/rover/0/0/0?m...2F293488177755

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    Quote Originally Posted by willgaga View Post
    On the universal stock, how would they work with the .223 if it has an H buffer? Buffered carrier or do you change out the H buffer?

    Also, this seems like a good deal considering recent prices. Not mine and no affiliation. Description clarifies it is not air soft and seems to have purchased from HKParts.

    https://rover.ebay.com/rover/0/0/0?m...2F293488177755
    @willgaga

    The non-pistol caliber stock requires a different buffer. It is an internal spring with a button plunger. The H buffer is not sufficient enough and if the A3 stock does not have the fore mentioned, then the BCG needs to. If you fire your gun without one of these buffers, it may/will damage the receiver.
    [HK 93A3] [SP5] [HK MP5-22LR] [SA SAR8] [PTR 9CT]

  11. #30
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    Ok. Thanks, is is possible to retrofit a universal stock with the correct stock buffer for the .223 or would you need to use the buffered carrier? I don’t think I have ever seen the buffer for the .223 for sale as a separate part, but maybe I have not searched correctly.

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