Take you M4 into your hands,
then find a nice spraypaint green or black depends on what you like. I ha a green one. Pull the spraypaint over your M4.
And your magazin is gone. :-D
Click the trigger and it makes the sound click... relog on the same server and tadaaaa....
Your magazin is back in your M4...
You think its magic.... Try it yourself...
You can either take the spraypaint of the vincinity on the ground, or out of your backpack.
If you dont logout, you cannot pull another magazin into your M4 so be careful to go into a pvp with it...
You can leave the M4 behind if you want... but it is rare!