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CMR-30 SBR and another prototype can

Discussion in 'NFA Firearms and Accessories' started by MachIVshooter, Aug 22, 2018.

  1. MachIVshooter

    MachIVshooter Member

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    Considered doing this for awhile, just finally got around to putting my personal CMR in the bound book and lobbing the barrel to 10". Except for the flush mag, these things bear a strong resemblance to the MP-7 when you cut 'em down!

    IMG_2759.JPG

    And then there's this thing:

    IMG_2761.JPG
    4.1" long, 1.3" OD and 7.7 ounces, it's a fully welded entirely 17-4 stainless critter with a small reflex chamber. Hearing safe with the shorty .22 WMR, and only adds 3" to the OAL:

    IMG_2757.JPG

    More testing to do on the can, but it should be robust enough for 5.56, although that won't be hearing safe. I designed it with .22 WMR and small centerfire rounds like the 5.7x28mm, .22 TCM and .22 Hornet in mind.
     
    adcoch1, Demi-human and LoonWulf like this.
  2. WestKentucky

    WestKentucky Member

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    That thing is pretty slick. You do good work all the time, but that cmr30 is a beauty. I haven’t seen a shorty yet. Just when I thought that the Suomi was cool...
     
  3. CapnMac

    CapnMac Member

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    Seriously cool.
     
  4. LoonWulf
    • Contributing Member

    LoonWulf Contributing Member

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    ok, ive never REALLY wanted to be able to own an SBR...but that thing right that makes me wish i could!
     
    adcoch1 and Demi-human like this.
  5. Ryanxia

    Ryanxia Member

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    Looks great! I wish they made one in 5.7 though. .22 WMR doesn't do anything for me.
     
  6. MachIVshooter

    MachIVshooter Member

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    Well, out of a 10" barrel, 5.7x28 has only about a 200 FPS advantage. CCI 40 gr. runs about 1,800 FPS from a 10" tube, while the 10.4" PS-90 hovers around 2K with SS197.
     
    adcoch1 and Ryanxia like this.
  7. ddc

    ddc Member

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    Me too.
     
  8. MachIVshooter

    MachIVshooter Member

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    Elbert County, CO
    My one gripe about the CMR is the amount of gas you get in your face running suppressed. You can actually watch it seep out around the bolt release tab for several seconds after you stop firing. But anyway:

     
    Ryanxia likes this.
  9. MachIVshooter

    MachIVshooter Member

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    Meters 133.6 dB avg. on the SBR CMR
     
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