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.
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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.
What’s wrong with the ejector
no ejector?