Blowback 300 project.

[MIKEONE]

Hey guys!

Ive been lurking around for a while here, im in the process of building a blowback operated 300 on the AR platform with a 9mm bolt and some other
little goodies.

My question is, have any of you attempted anything like this on any platform?

This will be a dedicated subsonic gun as to keep the pressures in the 25,000 psi range.

I have a feeling this puppy will be pretty cool once the EJECTOR is figured out.

Mike