I just bought the Classic Army set for my TM G36K project and I'm very impressed of the quality on how it was made. The best barrel set I've seen and even the RAS Handguard looks like the real Knight's Armament RAS. I think it looks even better then the Army Codes $195 G36K barrel set and the CA G36K RAS with barrel set cost only $124.
Classic Army G36K RAS set.
The Nitro.Vo RAS handguard don't even comes close to the CA RAS.
The one on the right is the CA RAS.
The barrel set fits nice in the TM body. One thing you can't use is the 247mm internal barrel so I bought the M4A1 363mm barrel and now it fits great to the flash hider.
I'm using the stock wiring with the fuse and I didn't want the RAS to cut the wires so I had to fit all the wires in the body.
The battery fits good with the RAS.
I also added the G&P rail and G&P G36K stock. just finished my G36K project.