Darkrp entities and weapons

HELP!!!
i have a DarkRP server but… how i restrict weapons and entities, What i mean is that people only use the weapons via F4 menu and must buy weapons, now they can just open Q menu go to entities or weapon tab, and get their weapon they like :frowning:

PLZZZ help.

Greetz,

Ben
Nickname coolpben

P.S sorry for my bad english :stuck_out_tongue: