.308 upper

Discussion in 'AR-15 Discussion' started by minchia, Mar 22, 2012.

  1. minchia

    minchia New Member

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    Hey guys
    I searched the web but couldn't get a confirmed answer. Will a .308 upper and mags fit on a 5.56 lower and function properly?
    Tia
     
  2. JonM

    JonM Moderator

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    no.

    however if you have a colt 901 in 308 you CAN fit any 556/223 upper and it will work
     

  3. canebrake

    canebrake New Member

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    Nope, yer talkin' AR-15 vs AR-10.

    Here's a visual;

    [​IMG]

    Not only does it make a bigger hole, it needs a bigger hole. (Mag well) [​IMG]