DarkRP 2.6.1 "This weapon is unavailible"

Hello, i’m a beginner when it comes to handling a Garry’s mod server. I’ve watched a lot of tutorials on youtube and read some text tutorials, most of them were alright. There is one problem i have with my “gun dealer” job. I’ve added some custom weapon shipments in the darkrpmodification/lua/darkrp_customthings/shipments.lua, and everything works fine. I’m assigned as a “superadmin” on the server and i can both buy the single weapon from the weapons tab in the f4 menu and the shipment from the shipments tab. But when i had a friend that is assigned to the “user” group trying to buy the single weapon, he gets a message saying “This weapon is unavailible”. But the shipment works completley fine.

To sum it up… Me, as an superadmin can buy both single weapons and shipments. But normal admins and users can buy the shipments but not the single weapons. I want help with making them able to buy the single weapons and get rid of the stupid “This weapon is unavailible” message.