KJW M4 GBB Help
 

I just received my KJW M4 GBB Ver2 in the mail. I haven't had the chance to shoot off any rounds yet, but love the kick it has, the weight and feel. Upon inspection I noticed that the grip is hallow and has a valve at the top. Looks like a gas valve, however the gas is obviously filled into the mag.

Can anyone tell me what is supposed to go in there? Yes I am an a complete airsoft n00b.

Thanks in advance.

Hi, it's the screw that hold the pistol grip.

oh...and so it is :eek:

Thank you very much