Home CMMG Old is NEW Again! Our Mk9 Now Has Radial Delayed Blowback

Old is NEW Again! Our Mk9 Now Has Radial Delayed Blowback

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You have all been asking for it, so we did it! We’ve updated our old Mk9 Colt Magazine 9mms to use our Radial Delayed Blowback system!

Available in both BANSHEE and RESOLUTE models in all sub-series.

We’ve also got upgrade kits available for you to take your Mk9 lower to a whole new level with and of our 9mm Radial Delayed Blowback uppers.

Go to to sign up to be a CMMG Insider, and you can click the home page icon to take you to our website.

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25 COMMENTS

  1. You guys should create 12.5" barrel length uppers for 9mm (and other calibers). The 12.5" size are big in states like NJ, NY, CT where we have "OTHER" firearms due to "Assualt Rifle" restrictions. This size gets us over the 26" minimum for legality. Just a suggestion.

  2. I received an email saying that you’d be available between 9 AM Eastern standard time at 10 AM Eastern standard time for questions will decide your radio blow back for the Colt style magazine 9 mm I have a question on whether or not you’re going to have 22 rimfire full upper still available in production for sale it’s an older product but I’ve been trying to track and see if I can get one

    It’s 9:25 AM Eastern standard time you’re on Tuesday

  3. My Mk57 Banshee is hands down my favorite freedom stick that I’ve ever owned, so I can only imagine how much fun the Mk9 wIth RDB would be! I bet it’ll be even more fun knowing that crazy Joe’s gun control-loving ass bought it for me with the dems upcoming stimulus check!

  4. Great, about 1year too late as I already made a frankenstein colt style lower working with the radial delay blowback. Dialing in the mag to feed ramp and mag to proper clearance for bcg was a bear, this would've made my months of tinkering a piece of cake. I do really love the RDB as I have 2 setups running them.

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