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Thread: CMMG .22lr conversion - a brief review

  1. #41
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    Well, I got a crack in my chamber adapter last weekend. Not quite sure how that happened but it did. Called up CMMG the next day, they paid for me to send it back and they shipped me a new one. Can't beat the customer service. I'm very glad I bought from CMMG instead of Ceiner!

  2. #42
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    Quote Originally Posted by Keesh View Post
    Well, I got a crack in my chamber adapter last weekend. Not quite sure how that happened but it did. Called up CMMG the next day, they paid for me to send it back and they shipped me a new one. Can't beat the customer service. I'm very glad I bought from CMMG instead of Ceiner!
    can you describe the crack? I noted a seam at the top that runs the length of my chamber adapter - just assumed it was manufactured that way. I keep an eye on it, but it hasn't done anything out of the ordinary yet...
    Last edited by lindertw; 11-26-08 at 19:06.

  3. #43
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    Quote Originally Posted by lindertw View Post
    can you describe the crack? I noted a seam at the top that runs the length of my chamber adapter - just assumed it was manufactured that way. I keep an eye on it, but it hasn't done anything out of the ordinary yet...
    I forgot to take a picture of it before I mailed it in, but it went almost all the way down the length of the chamber adapter and had cracked through, causing the chamber adapter to expand with any pressure. It definitely cracked when I was firing it. On the top of the chamber adapter, there was a indentation, so perhaps it had been bumped in the factory and cause it to weaken. I was pretty bummed because I only had a couple hundred rounds through it but I was relieved after talking with CMMG.
    Last edited by Keesh; 11-26-08 at 19:18.

  4. #44
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    Keesh,

    Here's how mine looks, a portion of it is welded and a portion of it not (note the seam/gap). I can't say for certain, but I think it looked like this since day one...



    I do note that it's a little tough to get the conversion out after shooting ~300 rounds or so, but I figured it may have expanded a little with heat. No bumps/indentations/bulges that I can see or feel. Hrmm, now you got me wondering.

    austin12gauge - how does yours look?
    Last edited by lindertw; 11-30-08 at 21:40.

  5. #45
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    Yep, that's pretty much what mine looked like but the crack went all the way down. I compared it to my friend's Ciener kit and his didn't have the crack. I'm shooting this through a brand new 10.5" LMT upper so I didn't wanna take my chances messing with the chamber, since I shoot 5.56 out of the same upper.

  6. #46
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    Thanks Keesh. I'll mark the ends of the weld with a sharpie and keep track of it to make sure it's holding up.

  7. #47
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    No offense, lindertw, but that looks nasty. I just looked at mine it it appears to be all one piece as I can't see any weld line at all. I'll check it again after I shoot it and let you know. It is nice to know they have a lifetime warranty and are easier to deal with than JC.

  8. #48
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    I'll email CMMG a pic of the chamber adapter and see if they'll replace it.

  9. #49
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    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?)?
    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

  10. #50
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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?)?
    Looks like we both got ours on the same day. I thought maybe it was extruded also. Maybe we got an improved version?

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