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Mega 1:8 twist barrel for AR pistol build

Discussion in 'Handgun Discussion' started by Nelson, Nov 14, 2015.

  1. Nelson

    Nelson Washington Member

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    I was looking at a Mega Arms 223 upper kit that had their 10.5" barrel but it had a 1:8 twist. The quality looks great and I already have the lower but I wasn't sure if I should stick with a 1:7 twist. I will be mostly shooting 55 gr Federal. Any thoughts if I will be lacking with the 1:8?
     
  2. B5Ben

    B5Ben Boise Well-Known Member

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    I think the 1/8 will be fine and give a little more flexibility if you decide to shoot anything heavier.
     
    mjbskwim likes this.
  3. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    I have had good success with 1/8 twist on the rifles I have built.
    Usually the twist I try to buy
     
  4. Nelson

    Nelson Washington Member

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    mjbskwim,

    Does that include your builds 10.5" and under?
     
  5. jluck

    jluck Really,Really, Close to Newport Oregon 97365 Voted #1 Member

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    Faster twist for heavier bullets. Slower for lighter. Either one would be indistinguishable in a pistol application neither will keyhole.
     
    mjbskwim likes this.
  6. mjbskwim

    mjbskwim Salmon,Idaho Well-Known Member

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    The 12in I did I shot with no problems. I did drill the gas hole out on the barrel a little,per watching some vids from ar15.com
    My 10in build I never shot,but the guys who bought it made a couple adjustments and it did fine.
    I can not say what the accuracy was on the 10in gun as I sold it before "I" shot it