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Thread: MSBS 5,56 - new Polish assault rifle prototype

  1. #331
    Senior Member tony6's Avatar
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    I see two issues here:
    1) first thing is stress distribution in the area. Two unwanted conditions meet here:
    - rapid change of cross-section from thick box (receiver box) to thin beam element (P-rail) - not very good in every design.
    - very small fillet radius in the gas regulator well area which will result in stress concentration: all the distress (cracks) in the material after couple of years in service will show up right here.
    Also you got pretty high temperature gradients in the area (hot barrel during shooting) - another factor which increases your stress.
    2) the second issue is stricty technological. I believe the geometry like that can cause some problems during the machining of this area. The P-rail is pretty thin and therefore can cause some issues with providing enough stiffness during the machining process.

    I would leave more material under the P-rail (to make it more stiffen) and mill the gas regulator well only in side walls of the reveiver box. Also I would increase the corner fillet radius in the gas regulator well to eliminate/decrease the stress concentration in this area.

  2. #332
    Senior Member REMOV's Avatar
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    Quote Originally Posted by tony6 View Post
    Can anyone confirm that in bull-pup version the upper P-rail and upper receiver are going to be one integral element?
    Once again the whole idea is that the modular assault rifle has got a COMMON upper receiver for both classic and bullpup version. When the weapon is coverted to the bullpup version, a module with a handguard and a rail system is mounted directly over the standard upper receiver NATO rail. The rail on rail mount is introduced for some reasons, one of them is to raise the sighting line.


  3. #333
    Senior Member tony6's Avatar
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    OK then. I was referring to the "rail system module" part, not upper receiver.

  4. #334

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    Quote Originally Posted by peter.pl View Post
    Why you think so?
    Because they are happy with latest Beryl, and untrusty in reliability of any new and untested design.

  5. #335
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    I could less about the looks of a weapons, just so as long as it functions and functions when i need it to, it could look like a blended cat sparkled on a turd.

    thou I will say the "picture" somewhere above makes it look like it was made from recycled GI joes

  6. #336
    Senior Member REMOV's Avatar
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    The design of the MSBS-5,56 systems goes in two ways: the mechanism (action) of modular assault rifle is being tested using the pre-prototype weapons called "technology demonstrators", in the meantime the industrial design team combined with a little help from experienced soldiers as well as commandoes developed external shape (focused on functionality and ergonomy). So for now there are four clumsy-looking demonstrators and four quite pretty external design mock-ups made by 3D printer. When Polish military officials officialy annouced the tactical-technical requirements for a new weapon then those two stages would be combine together. The first MSBS-5,56 model will be available in 2012.


  7. #337
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    Silence! Siemoniak has no idea this project is egsisting, if he knows, he will cancel it

  8. #338
    Senior Member REMOV's Avatar
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    Totally useless and very primitive comment. Moreover it is utter gibberish for non-Poles.

  9. #339
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    Stop it Remov, it wasn't so bad :P Our MoD is like flag in windy day so you got to understand my behavior

  10. #340
    Senior Member REMOV's Avatar
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    I do not understand you childish behaviour, I do not understand your stupid comments, as well as I do not understand your primitive complains. As a Pole I feel ashamed of your behaviour on the international forum.

  11. #341
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    Chill out a bit, Remov. It's Christmas and he did add a smiley.

  12. #342
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    Sory for not being good Pole :C

  13. #343
    Senior Member REMOV's Avatar
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    Quote Originally Posted by Stormz_STA View Post
    Chill out a bit, Remov. It's Christmas and he did add a smiley.
    So in your opinion if you add several emoticons to childish and stupid comment it is automatically not so primitive and not so idiotic? This is a thread about the MSBS-5,56 assault rifle and that individual goes there and thrashed it by his rubbish (some political rants about something he knows nothing). I am so sorry that I do not undestand such primitive sense of humour.

  14. #344
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    Yes, well...Merry Xmas to you too.

  15. #345
    Senior Member tony6's Avatar
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    Any update on the project? Any photos of the prototypes before MSPO 2012 exhibition in September?

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