i think i've managed the dart gun

[maximus_asinus]

No, but weapons have to be approved by myself also.

I doubt that weapons have to be approved by you. They are most likely run by you, but if you didn't approve, I doubt it would effect whether or not the item is uploaded.

Honestly, I hardly get on client, so why the heck would it bother me?

*insert RC idling comment here*

Regarding the rest of your post I'd say a weapon like this could work IF IT FOLLOWED THE STRICT GUIDELINES I MENTIONED. Laming with the one hit kill function would be limited due to the small amout of ammo. I'll even limit it even further.

max capacity: 15 darts
darts per clip: 5 darts
damage: 5 - 8 HP semi automatic. 100 HP lethal injection.
lethal injection can only be used with a full clip, so of course a lethal injection would cost 5 darts.
freeze time: 2 seconds semi automatic. 5 seconds lethal injection.
Uses both hands to prevent combinations with other weapons.
To refill ammo you'll need to purchase each single dart for 50$

With these rules set in place even laming would be difficult. If players attacked a dart gun user in a group they'd be able to kill the player before they'd be able to kill anyone. Really it'd be a weapon of last resort.