DarkRP: How Do I Make It So Only Gun Dealers Sell Guns

I have just started using a fresh version of DarkRP and I noticed that by default people, no matter what class they are can purchase pistols. I was wondering if someone could direct me to the place I need to edit it so they cannot buy pistols.

Regards,

EDIT: Go into config.lua or settings.lua inside the gamemodes/darkRP folder, find GM.Config.restrictbuypistol and change it to true, from false.

I know this is an old post, but it worked! I am so happy spent a hole day researching then found it on here! Thank you so much.