Guns as items

Hi,I m developing a fivem vrp server and i ve got the inventory hud but there is a problem with the guns.I want to know how can i make gunshops to let me buy just the ammo for the guns like rifle ammo and give it to me like an inventory item,or do something do make the ammo like an item and put it into markets

I don’t work with vrp, you should switch over to QBCore XD. It’s so much easier then vrp