AR9 SD and CMMG Buffer SlowMo Comparison

I test a direct blow back 9mm with a Maxim Defense roller delayed buffer. I’m using a ported barrel by Broad River Tactical and my B&T MP5 SD suppressor.
I compare that to Broad River Tactical’s new CMMG Radial Delayed compatible SD barrel. Then I change the buffers in the CMMG SD.
Second half of the video is testing a 16” CMMG with different buffers to see how much recoil and bolt speed there is.

[@jordanhorst6]

no ejector?

[@PubliusRutiliusLupus]

So if someone was considering between a 9mm CMMG Dissent or an AR9 with the Maxim roller delayed buffer, which would you recommend?

[@Solscud007]

CMMG hands down. Or buy an MP5 clone.

[@EtherFox]

With the bolt as dirty as it is, the point is moot. It's like clips of "different oil viscosities, same engine" when the engine used already has a spun bearing and no compression in one cylinder. No sense in tuning for the use after point of failure has already been reached.

[@Solscud007]

The dirtiness only affected ejection.

[@ChevTecGroup]

It's definitely showing a difference

[@EtherFox]

Like saying the lack of compression in cylinder 2 only affected idle.
Sure, you can see the difference. On the grand scale, it's just not as meaningful as if it'd been tested better.

[@Solscud007]

@@EtherFox not really the same. Faulty ejector has no bearing on the unlocking of the radial delayed barrel. Nor does it affect the bolt carrier speed.

[@psp1921tsmg]

What’s wrong with the ejector

[@Solscud007]

Dirty.