The early TNG phaser rifle is easy, as I already have most of the parts needed.
I forgot about the TOS phaser rifle. They only showed it like what, once in Where No Man has Gone Before? That thing was awesome. I'll try it soon.
The compression rifle, more difficult, but undoubtedly possible. I'll try this one later. The thing is, some of the laser rifles out now kinda were based off of this. However, they don't really work like the one from Star Trek.
TOS type 1 is going to be made. I have a type 2 body and a really bad type 1 for it. I'm going to remodel both and get back to you on that soon.