I don't think thats quite as outlandish as the "Yoghurt Gun" which was originally going to be in Counter-Strike, though I think the Korean version has a tonne of crazy stuff (including throwable pumpkins

)
TBH you don't need too many weapons in AM. All you need are the following:
5.56 auto rifle
5.56 semi-auto rifle
7.62 auto rifle (eg AK47)
7.62 semi-auto rifle (eg SCAR / FAL / M14)
9mm SMG
Machine Pistol (eg Uzi or Mac 10)
5.7mm SMG (eg P90 or MP7)
Bolt action sniper rifle (eg Remington 700)
9mm pistol
.45 cal pistol
Explosive weapon (grenade launcher or RPG)
It's your call SysOp! I'm just thinking you'll have trouble finding someone to do all those weapons for you :X
A few weapons it's like boring. Having too many weapons to pick could be a problem if there is not a limit of how many you can pick. But... since we added a limit of 6 slots (items, weapons) everything is so cool.

Not all the weapons will be available from the beginning though.
Anyways, I'm going to arrange (

) the way the weapons are displayed now. 8 slots are way too much. It will be cut to 5 categories. 5 sluts, I mean, slots.