I've extracted the addon and I'm trying to force the weapons to use the vanilla ammo (i.e SWEP.AmmoEnt = "item_ammo_revolver_ttt" for the FA:S Deagle)

I'm running into an issue though, the weapon can pick up the ammo and it's added to the user's inventory, but it doesn't actually add any ammo to the weapon's reserves. If the weapon is out of ammo and the player picks up the correct ammo type, they still can't reload or shoot.

What's the correct way of going about this?