I wouldn’t trust a direct thread can on a semi auto gasser just hand tight, it will back off on you. Seems like it would be a PITA to carry around an extra tool to torque the can on every time you remove it from the case, but if you’re cool with it, it should be OK.
My personal opinion? What you describe is a pretty good use case for a QD mount. I’d use something other than ASR, though. It’s needlessly long, heavy, and outdated compared to more modern options.