WK180-c / WS-MCR what accessories should we make?

An improved gas piston would sell like hot cakes.. I'd imagine it would require a revised gas block and/or receiver as well though...
 
why not upper for 6.5 Grendel 450 Bushmaster or 50 Beowulf??? And guys not really for this but would be cool a PS90ish rifle in 17wsm
 
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