Zpap M92 tactical and DA Wolverine owners: Questions?

Hello,

If you own or are very familiar with the Zpap M92 tactical and have a Dead Air Wolverine I would like some help.

When I bought this I had my LGS do the modifications to put the Wolverine on and it direct threads. The issue that I am having is that the hand guard and the can gets very hot. The can loosens after a few rounds and I am constantly having to tighten it back and even with gloves I am dang near burning my hand off. I am looking for a QD hub mounting option to solve this issue.

I have purchased the Wolverine Hub mount because from the research I have done it looks like this is definitely needed. I have heard mixed reviews about Keymo or Xeno so am looking for other options. Preferably something that is idiotic proof and doesn’t require any timing.

My understanding is that the threads are currently 26x1.5mm LH. What kind of muzzle device do I need to order and what hub mount would you recommend to make this easier to run with my Wolverine?

Also if anyone knows what this piece circled in red that is sitting between the gas tube and barrel under the hand guard is and if it’s needed that would be helpful to know. I noticed it was loose when I took the hand guard off for cleaning and am not sure what it is but I tightened it back up.