You must pry off the slide with a knife or some other object, ( pry from the back of the slide). Then there will be a silver pin you
must pop out,( its very easy to push out). Next unscrew the safety on the right side of the gun. Lift up from the barrel and its open.
Yes I have a bunch of airsoft gun's and i have used ammo that is the wrong size... and i clogged the gun and had to take it apart to get it out.
take apart the whole gun
It will fall apart over time.
Glock will send you a manual for free if you call them or contact them via their web site. Alternatively, a gun shop could show you.
Ahh figure out what the problem part is than figure out how to take the gun apart and put it back together from YouTube, an airsoft forum, or from an airsoft website. Than buy the replacement part and put it in the gun. If the gun was bought for under $100 than you would be better off buying a new gun instead.
An Airsoft gun
I suggest that you start by finding old, used, or broken airsoft guns (or your own), and taking them apart, to find out how they work. Then, you would have to find a material to build it out of, such as wood or lego's. After that, all you have to do is put everything together, and hey presto, airsoft gun.
Not intended for user to take apart.
A pump airsoft gun is a gun that has to be pumped every time before shooting. Ex. Airsoft shotgun
No
Don't think you can. If you can take yours apart you can paint it.
No