I reckon everything will be answered once I can get one of these in my hands...
But the situation now is - these guns (and related accessories) are totally legal in HK
BUT but not-so-legal in Taiwan and therefore nobody willing to help sending it overseas (i.e. if these items are already illegal in the first place then these shouldn't be available for export).
Trust me I'm extremely interested in the Hsu Wei products (as with their Beretta & their long 20rd mag) but I'd asked all the agents (that helps to bid & send items to HK from Taiwanese sellers unwilling to send items overseas) and chance is slim (similarly to the UK these agents might be too afraid to have their offices & homes raided - otherwise these won't be available "online" only)...
Once again feeling the frustration when I can't get something that are supposedly legal for me...