I like the luger look more than the modern carbine. Its more starwarsy, but both look good.
To answer a couple other questions. I believe that the 'mythosaur' skull in bobas case is called 'the deaths head' emblem. When I did some work on a starwars game in the 90s, there was a section on that. I dont remember the details but a google will probably show you.
For venting. I used 'window pane molding'. Its found in wal mart for like $5. I actually built the whole gun, in like a half hour.
Its got double sided tape thats ultra sticky, I cut it and placed it on, it made really nice venting, and it held paint well.
The gun cost like 15 bucks total, theres a thread about it in the blasters, but looking at the pics its pretty self explanatory.
The thread is called $16 dollar 1 hour ee3 or something.
Im going to try to find one of those lugers, so if you find a place shipping them let me know.