Neck of casing flat spot?

[Shivesy]

H buffers are not the issue, they are the correct buffers for the entire family of weapons, be it M or AR.

Yeah I know what they make, there is a reason for it.

I just don't agree with running anything heavier than H3 or H3G. I know something about this, I did the research and consulted with R&D.

9mm buffers belong in 9mm weapons.

each weapon type has a particular need for a specific weight buffer.

These buffers that are being discussed are all new to me. I'm curious what the difference is between a H3 and a 9mm buffer?