GUN M4A1 compared to M4 upper

Discussion in 'On Topic' started by Didact, Dec 3, 2007.

  1. Didact

    Didact I have no idea what I'm doing

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    Yeah... ah... What's the difference?

    I see the differnce in the rifles according to wiki, so the uppers difference is in the handgaurds and barrel 'flats'?

    :noes:
     
  2. PanzerAce

    PanzerAce Active Member

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    IIRC, there isn't really an M4A1 upper style. The A1 was the original carry handle/rear sight design:

    [​IMG]

    While M4s use the A4 style upper receiver with the railed falttop
     
  3. Didact

    Didact I have no idea what I'm doing

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    Well when I'm looking around for uppers online, the pics of either a M4A1/ SOCOM upper and a M4 upper both look the same. Some desciptions are just as vauge.
     
  4. kellyclan

    kellyclan She only loves you when she's drunk.

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    In referring to the M4, I believe the A1 designated models were a lower change from the original M4 safe-semi-full to the M4A1 safe-semi-burst. It also usually meant a flat top upper as opposed to the A2 fixed, but since all M4's come flat top now, it would no longer indicate that.
     
  5. Paul Revere

    Paul Revere OT Supporter

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    i think what he means is the barrel profile difference?

    [​IMG]

    Lightweight - thin the entire length.
    government - thin under the hand guards, heavy profile from the gas block to the flash suppressor
    M4 - stepped barrel, thin under the handguard.
    A1 - generally a lightweight barrel, whole length.
    A2 - generally a government profile, sometimes an HBAR
    HBAR - very heavy under the handguards, heavy to the FS.
    standard - heavy all the way to the FS.
    Pencil - thin the entire length.

    :dunno:
     
  6. Didact

    Didact I have no idea what I'm doing

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    Ah ha! There we go, so how does that translate to performance or use?
     
  7. Paul Revere

    Paul Revere OT Supporter

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    glad to help :cool:

    the only difference, from what i've gathered, is that with an m4 (also known as SOCOM) barrel you can use an M203 underneath :dunno:
     

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