First of all, that's why that M4 is set only for VIPS!
It could have been set for all to be bought by points or ammos!
That's why M4 is only for VIPs and not for everyone. Who has it, he is going to make a lot of ammo, and kills at the same time.
BUT don't forget, because it needs only 1 time for that item to be dropped and he can't get it back again. Only if he buys it again normally, but in some cases it costs a bunch of points to buy it! That's why that weapon makes a little bit difference between the player and VIP.
I'm not trying to "destroy" the balance between player and VIP. But this is the only explanation that every Admin would've give you!
These are just benefits of VIP. It is necessary to have them.
TY