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  1. #1
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    22 long rifle conversion and barrel twist rate question.

    Myself and several friends have the cmmg 22lr conversion for our AR15. We love them, have zero problems and recommend it to anyone so incline.

    So, my question is what barrel twist rates have worked well for anyone else using the conversion kit?

    It is my belief the preferred 22lr twist rate for a dedicated rifle is 1-12. Since most AR15's have 1-8, or maybe 1-9 with a few having 1-7, how does this difference affect typical shooters?


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  2. #2
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    Twist rate for most all .22LR is 1/16.

    I have a CMMG Mk4T dedicated upper.


  3. #3
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    Quote Originally Posted by ChattanoogaPhil View Post
    Twist rate for most all .22LR is 1/16.

    I have a CMMG Mk4T dedicated upper.

    Your twist rate is 1/16?



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  4. #4
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    I still have one CMMG dedicated .22lr upper, though it's the 2" barrel.

    1/16 twist.

    Looks like all the .22lr barrels on the CMMG website are listed as 1/16.

    Never had an issue with 1/7 and 1/8 guns I've used conversion kits on, but then again, they were just plinkers and not super accurate.

  5. #5
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    I need to build a 22lr


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  6. #6
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    Quote Originally Posted by UWone77 View Post
    I still have one CMMG dedicated .22lr upper, though it's the 2" barrel.

    1/16 twist.

    Looks like all the .22lr barrels on the CMMG website are listed as 1/16.

    Never had an issue with 1/7 and 1/8 guns I've used conversion kits on, but then again, they were just plinkers and not super accurate.
    Wait, 2" barrel with a 1/16 twist? We are going to need a picture of that one.
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  7. #7
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    Quote Originally Posted by Stone View Post
    Wait, 2" barrel with a 1/16 twist? We are going to need a picture of that one.
    Haha... had my doubts, looked it up, that's what the CMMG website claims!

  8. #8
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    Quote Originally Posted by porterdavid98 View Post
    Your twist rate is 1/16?



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    Yes, 1/16.

    Every .22LR I own... S&W 15-22... Sig 522... Savage FV-SR... all my Ruger pistols... all have 1/16 twist rate.

    Most all .22s, there are exceptions, have 1/16 twist rate.

  9. #9
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    Quote Originally Posted by ChattanoogaPhil View Post
    Yes, 1/16.

    Every .22LR I own... S&W 15-22... Sig 522... Savage FV-SR... all my Ruger pistols... all have 1/16 twist rate.

    Most all .22s, there are exceptions, have 1/16 twist rate.
    Thanks Guys. Very helpful.

    I have ordered a 1:16 barrel. Want to compare with my Wylde 1:7.

    I now understand 1:16 is ideal, and also understand 1:7 works, but can we expect any reasonable performance without a dedicated 22lr rifle. I kind of like versatility.


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  10. #10
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    Quote Originally Posted by porterdavid98 View Post
    Thanks Guys. Very helpful.

    I have ordered a 1:16 barrel. Want to compare with my Wylde 1:7.

    I now understand 1:16 is ideal, and also understand 1:7 works, but can we expect any reasonable performance without a dedicated 22lr rifle. I kind of like versatility.
    Generally, issues with conversions is reliable cycling. Since you're already enjoying zero problems now there's no reason to expect that to change. Assuming your new barrel is of quality manufacture, ammo selection is the big accuracy variable with .22lr.

    Not sure what you mean about versatility. Generally speaking, the big advantage to a rimfire conversion is for guys who got a ton of money in their rifle but want to keep training expenses down while having their hands on the same rifle. They aren't chasing accuracy with more appropriate rimfire twist rates but rather economical trigger time with their rifle. Otherwise, there's complete rifles that mimic the AR platform and controls well enough, like the M&P 15-22, that you can pick up for pretty cheap these days.
    Last edited by ChattanoogaPhil; 27 August 2017 at 10:03.

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