kjw m700 problems

[Python]

hey guys i bout this gun for 40$ off of craigslist it wasn't shooting ended up only being the screw inside the bolt was fully un screw, tighten it up and shot great, now the gun when a bb is loaded by the bolt it will just roll out of the barrel, i think the hop up is loose and thats the problem, is this correct? also how do you get to the hop up in the kjw m700 take down version.

[Nox]

you can find the manual for the gun here