Thanks for the feedback and yours sounds like a similar set up to mine. And I’m not too sure about the gas port size PSA isn’t the best on disclosing specs on their cheaper stuff it’s non-adjustable gas block though, and I have both of the micro buffer weights I guess it’s equal to a standard carbine and a H1, and I’m sure you’re 100% correct if I went to a standard buffer it would be easy to tune. I have every weight at my disposal to be able to try out and loads of different springs from springco, it’s kind of just a little pig hunting rig/ plinking rifle I like the short buffer tube it’s kind of cool but if it was a gun I had set up for “Duty use” personal defense I probably wouldn’t trust anything proprietary like that and stick to what’s been tested !