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AR15 want to shoot 5.56 & 5.45

Discussion in 'Black Rifle Forum' started by Tech knight, Jan 17, 2011.

  1. Tech knight

    Tech knight

    Aug 20, 2010
    I now have plenty of 5.45x39 ammo. What parts do I need?

    If I order a Spike's AR15 mid length in 5.56, what other parts will I need to shoot 5.45?

    I see Spike's sells a part for shooting 5.45. Is that all I need or do I need a different barrel as well?

    On a related note I saw you can switch a single part and shoot .22lr out of it in a youtube video. Is this true?
  2. Bushflyr

    Bushflyr ʇno uıƃuɐɥ ʇsnɾ Millennium Member

    Mar 17, 1999
    Western WA
    You need a whole new upper. And mags.

  3. MisterPX

    MisterPX Guest

    You'll need a 5.45 barrel, and a 5.45 bolt. All other parts are the same as the 5.56
    You can run dedicated 5.45 mags, or try your luck using 5.56 mags.

    With the 5.56 assembly, you can remove teh bolt carrier group and replace it with a 22lr conversion.
  4. boomhower


    Feb 14, 2010
    North Carolina
    Easiest way is to just get a 5.45 upper. S&W is a popular choice as well for them.