List of known G36 model producers:
- ARES/STAR
- CA
- TM
- JG/Echo 1
My guess is that the model would be JG, but once again, despite the cornflakes argument, I still maintain it doesn't exist. Hell, CAS even told you that.
As much as I'd like you aquire a gun despite being underaged... the model you want simply is not currently available from CAS and would be mostly clear if it did.
Seriously, I don't know exactly when your 18th birthday is, but at 396$ MSRP for a half clear low-end gun, save an extra 50-100 and get either CA, STAR or ARES.
Hell, you'll find black JG G36s (or TM) for less.