DarkRP 'This Weapon Is Unavailable' when spawned.

[CatWithACat]

I'm using the FA:S 2.0 weapons mod for my server. I've been able to attach these weapons to classes when they spawn, however when I try to spawn them from a gun dealer, a small notification pops up in the bottom right of the screen saying that 'This Weapon is Unavailable'. I've even done the same with the ammo, and I get the same error, just for ammo. I have the weapons in the addons folder for the server, and I'm using the correct models and entities for them. Any help? This is what I have in my 'shipments.lua' file under the modifications folder.

AddCustomShipment("Raging Bull Python Single", "models/weapons/w_357.mdl", "fas2_ragingbull", 1500, 1, false, 250, false, {TEAM_GUN})
AddCustomShipment("Raging Bull Python Shipment", "models/weapons/w_357.mdl", "fas2_ragingbull", 6500, 1, false, 250, false, {TEAM_GUN})