Home CMMG What's the deal with Radial Delayed Blowback?

What's the deal with Radial Delayed Blowback?

By
CMMG
-
1476
36

Here we take a quick look at our Patented Radial Delayed Blowback operating system against a Traditional (Straight) Blowback system.

There is a lot of technical information here, so feel free to hit us up in the comments with any questions.

Thanks to Dustin Ellermann for the footage comparing the recoil impulse of each system!

Check out Dustin’s channel here:

Note to readers: Please click the share buttons above or below. Forward this article to your email lists. Crosspost on your blog site, social media, internet forums. etc.

RELATED ARTICLESMORE FROM AUTHOR

36 COMMENTS

  2. WILL THE ENDOMAG SYSTEM WORK IN THE RADIAL DELAY SYSTEM? HERE & THERE I READ NO & OTHER VIDEOS I READ YES
    ALSO I READ THET GLOCK MAG ADAPTERS DON'T WORK WELL EITHER SO MORE REASON TO JUST GET A STRAIGHT BLOW BACK 9 MM UPPER RATHER THAN BUYING A DEDICATED 9 MM LOWER TO MAKE THE RD FUNCTION

  16. The two CMMG RDB 9mm uppers I've used had very snappy recoil like a straight blowback 9mm AR but were very unreliable. One was my buddy's upper, which he returned to CMMG and they said it was faulty and replaced it. The replacement is the other one I've used, and it also doesn't work. I really don't like straight blowback 9mm ARs, but at least they work until they hammer themselves to death.

    I have a CMMG 22 AR upper, and it doesn't work.

    My other buddy bought a CMMG LPK for his AR, and the trigger doesn't reset.

    They're 0 for 4 in my book.

    I think the CMMG RDB could be really cool, if it worked, or did any of the things they say it does. But it doesn't, because the operating system is total garbage.

    Look at their slow mo in this video, and check out the ejection pattern on their gun. It's random. Some rounds bypass the shell deflector. On my buddy's gun, almost all the cases bypass the deflector and some hit him in the face because he's lefty. The guns just don't work. I'm glad they showed how garbage their guns are in their own advertising. Check out how repeatable the blowback action is in comparison.

  17. That's great, but why not just go DI? ie what's the advantage of any delayed blowback design over a DI or piston setup? I'd love to build a 10mm AR pistol, and the radial delay seems like a neat idea, but I'm still wondering how it would compare to a DI or short stroke piston 10mm?

  19. Sold. Take my money.
    I have a boat load of uppers and lowers (556,308 & 300). I loaded up 20k 9mm, but only had a 1911 in 9mm. I ended up buying a Kel-Tec Sub2k in G19, so I had to buy a G19 as well. I love the fact that I can plink 4in steel all day long at 95M with the Sub2k. The AR 308s and 556 destroys the chains. Ive been looking at 9mm AR builds for the last 5 years, all straight blowback. Gimmick or not. Im sold on the gimmick.

  22. Wonder why the banshee mk4 can't be converted into a 45 acp or 10mm? You can get it in 300 blk out, 5.7 but then the next caliber that it can be converted to drops all the way down to a 9mm 🤷‍♂️ I would like something a little cheaper to shoot but not have to lose a bunch of stopping power. Not that the 9mm doesn't have stopping power obviously.

  25. So will this work with new frontier armory glock 9mm lower and a new frontier upper with LRBHO? Basically I'm asking if I get the barrel and the bolt and throw it in, is that OK?

  32. Does the CMMG 5.7 x 28 radial delayed blowback still require coated ammunition in order to feed and extract? Reloading 5.7 x 28 is pain in the ass because of the plastic coating. It would be so much simpler to just throw it into a tumbler.

  34. YOU CAN MAKE TRENDY VIDEOS WITH FANCY SCHAMCY GRAPHICS EXPLAINING YOUR RADIAL SYSTEM ALL DAY LONG
    BUT
    IT'S STILL NOTHING BUT A WAY TO SCREW US CONSUMERS OUT OF OUR HARD EARNED MONEY BECAUSE OF YOUR GREED !!!PLUS YOU REFUSE TO MAKE IT CLEAR ABOUT CAN WE RUN YOUR UPPER ON A EVERY DAY LOWER RECEIVER
    WE KNOW MOVING PARTS WILL WARE OUT & WE DON'T CARE IF WE GET 1000 OR 5000 ROUNDS DOWN THE PIPE.
    OF ALL MY GUNS IN THE LAST 10 YEARS I DOUBT I RAN A TOTAL OF 1000 ROUNDS ANYHOW.
    PLUS IN MY 15 YEARS OF A PRO HARLEY DRAGBIKE RACER MOST EVERY BIKE I HAD WAS GUARANTEED TO "MAYBE START"
    RECOIL & LOUD FIREARMS IS WHAT IT'S ALL ABOUT SO IF YOU CAN'T HANDEL THE HEAT,,, STAY OUT OF THE KITCHEN
    SO BIG THUMBS DOWN ON THIS VIDEO,,,
    ALL I NEED TO KNOW IS
    [[[ IF I BUY YOUR BARRELED UPPER WITH YOUR BCG WILL IT DROP IN & RUN ON MY NEW PSA LOWER ]]]

Leave a Reply