I'll have to ponder that one.
Actually, having left and right hand threads being different on the barrel and mount present other challenges - once you get one of them tight, it begins to loosen the other. I had an Omega 9K left-hand direct threaded to my MPX and when I got it tight onto the barrel, the mount came loose from the can. That's when I started doing the tools so I could tighten the mount to the barrel without involving the tube. Tucking the can makes it a bigger problem. Luckily the MPX handguard can be removed from the front, exposing the mount and barrel.
This is how I discovered that 3-lug was the way to go.
Regarding the Mask, I'd use one layer of teflon tape on the barrel and maybe two on the mount - that way it would be easier to get off the barrel before the mount unscrews.