How Do you install a mock silencer on a standard G36c?
 

What kind of silencer would I need? im guessing a 14mm. and how would it fir on the barrel?

Screws on, just like every other AEG.

either need a small barrel extender or get one of those pistol suppressors with the built in extender bit.

Shouldn't need an extender.

1) Remove the set screw holding on the flashider.
2) Remove the flashider
3) Screw on suppressor.

It may depend on the brand of G36C in question, but you probably will need some sort of extender to get enough clearance from the handguard. At least, I needed one for my Ares G36C. Actually, I used a short thread adapter. My Ares, and many other G36s come with 14mm+ threads, while most suppressors come with 14mm- threads. Just get a short + to - thread adapter, and you'll be good to go.

a mock silencer on a heckler, are you punny?