Great progress! I've wanting to build this for a while too.
Had you considered using the TM clone instead? Muc hcheaper and practically identical!
If you haven't yet, you might consider using wood putty, or metal putty to fill those screw holes on the right side of the airsoft gun, then give it a coat of flat black.
Interesting work on the silencer adaptor! That's the first time I've ever seen that done.
I don't think that's a Mac 11. Check out the handle. Totally a Mac 10 handle.
Also I keep reading reviews that it matches up perfectly to the TM Mac 10 inside and out minus the quality of internals mechanisms and the trade marks.
But if you something I don't please let me know! You're project has got me itching to build one!
You know what kinda weird. I was looking at the top image of the gun in the case and at the shot of the Mac 10 laid out on the table and notice the grip is missing the palm bump.
View attachment 457432
I wonder what the story is there? Maybe a variation in Mac early Mac 10 production?
Just found this info on a different thread- http://www.therpf.com/f9/escape-new-york-la-43474/
"The MAC10 pictured here is the .45cal version (you can tell from the bump in the grip) while the one in the movie is the 9mm version (not to be confused with the M11/9mm!)."