G&G gr16 R4 charging handle stuck!

[deekdeek]

HEy i just got a G&G r16 R4 and have a question. going over the manual they said to pull back the charging handle to release the hop-up. So i did that and the charging handle is now stuck in the full back position and cant get it to go back.

then i realized that the instruction was probably for the full metal version.

How do i get the charging handle pushed back in?

also the hopup door is not opening.

thanks for your help