KJW Glock 32c sticking slide and barrel
 

Hi, I have bought a KJW Glock 32c and have been using it for a few days and I noticed whenever I pull the slide back the slide sticks on its way forwards again. Sometimes I have to force it forwards. Does it just need lube or is it broken?
Also, the barrel wobbles..
If anyone has this gun, I would GREATLY appreciate your reply! Thanks!