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Thread: CMMG .22lr conversion - a brief review

  1. #151
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    Brownells has retail and wholesale prices. The wholesale prices are for their dealers, like myself, who resell their products. Wholesale prices can be as much as 40% off retail price on some products, still other items wholesale and retail price are the same. Usually, for example, I can save someone an average of 10-12% off their entire order not including shipping, which is my goal. The items are then dropped shipped from Brownells to my customers door. I usually make about a 5-10% profit, not much but it helps pay the bills.

    Anyway, I have found Brownells prices on most items cheaper retail than USAMidway. Brownells opened a reloading division call Sinclair International, haven't ordered anything from them yet.

  2. #152
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    UPDATE on CMMG .22lr conversion

    UPDATE on CMMG .22lr conversion. I returned my unit to Brownells, explained that the spent cartridge would not eject and other problems. Brownells 100% satisfaction no-matter-when-you-bought-it is the BEST. Not only did they replace the unit with no questions, they even had one of their Tech guys actually TEST FIRED a new unit before they shipped it. This took a couple of extra days but I didn't mind. Brownells even sent me a check for my return shipping automatically! This is customer service at it's finest!

    The new unit simply dropped it like you would expect it to and cycled just fine. The new unit was tight, unlike the first one, when removed and in your hands. The phosphate finish was not overdone like the first one and the overall final finishing was much nicer.

    At the range, the mags fed well (same Big Dog mags I had to clean up though to work, these were not replaced) and the CMMG unit functioned almost perfectly through 100 rounds with only one failure to fire (bad round as the firing pin hit hard) and one failure to eject (again maybe the cheap Federals I used).

    So, my conclusion, I must have gotten one made either on a Monday, made by a newbie or a monkey did it, because there was a noticeable difference between the two units.

    Nonetheless, the replacement unit is a very nice and I'm glad I purchased it. So is my son! And Brownell's has made me a customer for life!

    RVGP

  3. #153
    Join Date
    Jan 2007
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    Cleveland, Ohio. The Danger Zone.
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    Any updates on these kits? Just bought a stainless one.

  4. #154
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    Standard CMMG Unit

    With a couple thousand rounds through this conversion unit, in a Colt 6520, it now runs without problems. Took about two hundred break in rounds, but now it zips right along firing Walmart Federal bulk pack ammo.

  5. #155
    Join Date
    Mar 2010
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    Southern Indiana
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    I've got the stainless version. It runs absolutely great. I had 2 fte's in the first mag. The only other fte was after firing 300+ rounds. Pulled the bolt, spray it with cleaner, dropped it in and ran for another 200 or so with no issues. CMMG will tell you NOT to take them apart for cleaning. The rails can distort.
    Best running conversion I've had, and I've had 3. 2 Spikes, 1 Ciener.

    The Evolution is coming out soon. It will be the shzzz. Real last round bolt hold, working forward assist, locking mechanism from chamber to barrel locking lugs. Really looking forward to it.
    Independent Field Testing/R & D

    Better to die for something than live for nothing

  6. #156
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    Jul 2009
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    SE Tennessee
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    Great Customer Service CMMG!

    My old CMMG kit has served me well for about 5k rounds. I had a little trouble removing it after my last range trip. I found that the chamber adaptor was cracked. I e-mailed CMMG's customer service to let them know. Garson shot me an e-mail back within minutes asking what kit I had (black or silver), and my address. UPS delivered a new chamber adaptor to my door 2 days later. 2 thumbs up for CMMG and their customer service.

  7. #157
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    Mar 2010
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    Southern Indiana
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    Another tid bit about the new kits.
    The old chamber inserts were stamped steel. The new chamber inserts are machined from a block of steel.
    Even though the general look of the old vs. new are close, the performance, options, and quality of the new kits are very different.

    CMMG has taken a lot of time and effort, going through the original design, fixing flaws and adding upgrades.

    If you liked the original Atchinson design at all, you will loves these.
    Independent Field Testing/R & D

    Better to die for something than live for nothing

  8. #158
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    CMMG Unit Damaged Upper Receiver

    The Stainless CMMG .22 Conversion Unit that I recently purchased has damaged my upper receiver. After shooting, I literally had to forcefully
    yank out the unit and discovered a 1.25 inch cut on the left side of the S&W M&P 15A receiver extending rearward from the chamber.
    Would really appreciate recommendation from AR 15 savvy moderators. Don't plan to re-install unit anytime soon.
    Last edited by greyman556; 03-03-11 at 10:48.

  9. #159
    Join Date
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    Quote Originally Posted by greyman556 View Post
    The Stainless CMMG .22 Conversion Unit that I recently purchased has damaged my upper receiver. After shooting, I literally had to forcefully yank out the unit and discovered a 1.25 inch cut on the left side of the S&W M&P 15A receiver extending rearward from the chamber. Would really appreciate recommendation from AR 15 savvy moderators. Don't plan to re-install unit anytime soon.
    Have you tried talking to CMMG about the problem? If not, you probably won't get a lot of sympathy around here.

    Forum Rules: http://m4carbine.net/faq.php?faq=vb_...q_new_faq_item

    4) Contact The Manufacturer or Dealer First – Internet forums have a large global audience and unsubstantiated or ill-informed comments will affect the livelihoods of a lot of hard working people in the industry. If you have an issue with a manufacturer or dealer that you would like to resolve, we ask that your first contact them to resolve it.
    Last edited by austinN4; 03-03-11 at 13:51.

  10. #160
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    Quote Originally Posted by greyman556 View Post
    The Stainless CMMG .22 Conversion Unit that I recently purchased has damaged my upper receiver. After shooting, I literally had to forcefully
    yank out the unit and discovered a 1.25 inch cut on the left side of the S&W M&P 15A receiver extending rearward from the chamber.
    This doesn't make sense to me. Photos would help here.

    The regular cycling of the bolt in the conversion kit's rails shouldn't bring it into contact with the upper receiver at all. It sounds like you somehow jammed the conversion in your upper, and then by removing it you gouged your upper.

    BTW, I have several 100s of rounds through my early-production CMMG conversion, with no problems whatsoever.
    I like it so much that I now want to buy some .22 spinner targets to make shooting more entertaining than punching paper...

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