I couldn't decide if I wanted to tick off the Armalite crowd, or the MP5 crowd, so I figured I'd just post here.
BEHOLD!........The MP-R7!!!!.........................BWAHAAHAAHAA!!!!
The lovechild of a Well MP5 and a Well R7!?!?
Fully functional, and pretty clean, if I do say so myself.
I picked the name because I could easily mod the lower receiver trademark, and it does make sense kinda.
Also note the G3 cocking handle.
This is your brain on Insomnia kids.