What do I do about my airsoft gun?

Question

I bought a JG M4 CQBR and its already jamming on the second day. I'm assuming its because i used .12 gram bbs in it the one day. I can only shoot about 50 shots before it gets jammed again. I'm going to lube and clean the internals and if that doesn't work what should I do? (besides just send it back because it takes forever to get it back)

Answer 1

Make sure you don't have the Hop up set too high.  That is a sure way to jam your gun.  Turn the hopup all the way off and the fire a shot, slightly adjust, fire again.  Wash rinse repeat until you get a nice flat trajectory.  

Lubing it will help too.  Use .2g or higher on that gun.