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Thread: CMMG .22lr conversion - a brief review

  1. #51
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    Quote Originally Posted by FromMyColdDeadHand View Post
    I just got mine today. I looked the chamber adaptor and I don't see any weld line at all? If I had to guess, I'd say that it was extruded. Where is the weld on the part (top, bottom?)?
    it runs along the top.

  2. #52
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    Nuthin', totally seam and weldless.
    I just did two lines of powdered wig powder, cranked up some Lee Greenwood, and recited the BoR. - Outlander Systems

    I'm a professional WAGer - WillBrink /// "Comey is a smarmy, self righteous mix of J. Edgar Hoover and a gay Lurch from the "Adams Family"." -Averageman

  3. #53
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    Linder, everybody,

    Is the "Federal bulk" .22 ammo you're shooting "high velocity," or not? I'm starting to collect different types of ammo in anticipation of getting a kit, and my impression was that these kits generally funtion best (most reliably) with "high velocity" ammo.

    Or is the "high velocity" label just marketing hype?

    Ben

  4. #54
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    The federal bulk I have on hand is the maroon/black box of 550 from Walmart. Side of the box reads:

    high velocity
    36 grain
    copper plated
    hollow point

  5. #55
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    Quote Originally Posted by lindertw View Post
    The federal bulk I have on hand is the maroon/black box of 550 from Walmart. Side of the box reads:

    high velocity
    36 grain
    copper plated
    hollow point
    That's the same one I use through all my .22LR conversion kits and it's been flawless.
    We must not believe the Evil One when he tells us that there is nothing we can do in the face of violence, injustice and sin. - Pope Francis I

  6. #56
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    Took my CMMG 22LR/Noveske N4 combo to the range yesterday. I put 8 mags of 20 each thru it for 160 rounds total and had numerous failures to feed and fire, both due the bolt not closing all the way. I simply dropped the mag and cycled the bolt (shell stayed in chamber) and it then always locked up and fired. I also wondered if I had mag problems, but it occurred with all 4 BDM mags I had so I doubt it.

    I also had a few light strikes but I was able to get all failures to fire to work in my Buck Mark Practical URX (love it) except 2, which I put down to dud ammo. I only had Remington Golden HPs to work with as my Buck Mark and Marlin 60 function well with it and I was hoping the CMMG would also. I am also going to try some other HV as well, probably Federal and CCI.

    I am going to clean the the CMMG well today (should have before I took it out, but I didn't - I know, I know) and maybe strip it down to see if I have the same FP problem that lindertw had. The good news is that whenever it went bang I had no extraction problems.

    I will say I was pleased with the accuracy out of a 1:7 barrel. I have my Aimpoint Micro zeroed at 50 yards, and at 25 yards it shoots about 1" low with PVRI 55g 5.56. With the 22LR is was shooting about 3" low at 25 yards so about 2" lower than the PRVI, an easy mental adjustment to make without having to change the zero on my Mirco.

  7. #57
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    Quote Originally Posted by austin12gauge View Post
    Took my CMMG 22LR/Noveske N4 combo to the range yesterday. I put 8 mags of 20 each thru it for 160 rounds total and had numerous failures to feed and fire, both due the bolt not closing all the way. I simply dropped the mag and cycled the bolt (shell stayed in chamber) and it then always locked up and fired. I also wondered if I had mag problems, but it occurred with all 4 BDM mags I had so I doubt it.

    I also had a few light strikes but I was able to get all failures to fire to work in my Buck Mark Practical URX (love it) except 2, which I put down to dud ammo. I only had Remington Golden HPs to work with as my Buck Mark and Marlin 60 function well with it and I was hoping the CMMG would also. I am also going to try some other HV as well, probably Federal and CCI.

    I am going to clean the the CMMG well today (should have before I took it out, but I didn't - I know, I know) and maybe strip it down to see if I have the same FP problem that lindertw had. The good news is that whenever it went bang I had no extraction problems.

    I will say I was pleased with the accuracy out of a 1:7 barrel. I have my Aimpoint Micro zeroed at 50 yards, and at 25 yards it shoots about 1" low with PVRI 55g 5.56. With the 22LR is was shooting about 3" low at 25 yards so about 2" lower than the PRVI, an easy mental adjustment to make without having to change the zero on my Mirco.

    Remy Golden Bullet is the WORST .22 ammo on the blanet. I do not fault the CMMG conversion kit for not working with that ammo.

    Try some Winchester Dynapoints or Federal bulk pack (much better).


    C4

  8. #58
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    Quote Originally Posted by C4IGrant View Post
    Remy Golden Bullet is the WORST .22 ammo on the blanet. I do not fault the CMMG conversion kit for not working with that ammo.
    I didn't fault CMMG, simply reporting on my first outing. I even admitted I didn't clean it first. And since it ran about 85% with the WORST .22 ammo on the blanet I feel pretty good. Plus it was all I had at the time on Thanksgiving Day.

  9. #59
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    Quote Originally Posted by austin12gauge View Post
    I didn't fault CMMG, simply reporting on my first outing. I even admitted I didn't clean it first. And since it ran about 85% with the WORST .22 ammo on the blanet I feel pretty good. Plus it was all I had at the time on Thanksgiving Day.


    These kits also need a lot of lube to run properly.


    C4

  10. #60
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    Found a new use for a plastic beer can handle. It works great at retaining the bolt under pressure when you remove the chamber assembly:



    fixed your image--gotm4
    Last edited by Robb Jensen; 11-28-08 at 10:36.

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