what types of hop ups from other guns are compatible? I really wanted something metal, but no one has g36 metal hop ups in stock that are compatible. What hop up would you recommend? I have heard great things about pro win hop ups, but I have no idea where to get them in the states.

www.wgcshop.com
www.uncompany.com
www.redwolfairsoft.com

Not in the states, but you'll find what you're looking for.

The pro-win hop-up unit should be compatible unless the JG uses some kind of proprietary hopup for the G36... but I don't think it does.

EDIT:
Of course it's amazing what a little googleing will do for you:
http://www.airsoftgi.com/product_inf...oducts_id=2008

thanks. i already knew about the plastic ca g36 units in the states, but i figured that since i have to replace it anyway, i might as well get a better one.

thanks for the site, im gonna have a look around.