Yes, blueguns are legal to import, bus as for clearsoft, some retarded/overzealous CBSA agent might not allow them in.
Usually, they do not have any working part at all, IE if it has a retractable stock, it will be molded in extended or retracted position... not adjustable by the end user (it also means that you can't install, say a Crane on a gun which comes with a LE, you'll have to buy a new bluegun). Same thing for mags, they are molded in and you can't remove them. You can't change the handguard or pistol grip. Etc... They have absolutely no "working" part at all.
For your purpose, I'd highly suggest getting this (though it's now out of stock) and painting it blue:
http://www.businessvision.net/edge/M...&CategoryID=72
That's an early gen JG M4A1, so if you want to change the stock, it will be easy. You'll also be able to install a RIS if you need it to display a taclight or grip in your pics, or whatever else you could need.