diff --git a/src/controllers/custom/getItemListsController.ts b/src/controllers/custom/getItemListsController.ts
index 92eedda0..ec768b83 100644
--- a/src/controllers/custom/getItemListsController.ts
+++ b/src/controllers/custom/getItemListsController.ts
@@ -18,7 +18,7 @@ function reduceItems(items: MinItem[]): ListedItem[] {
 const getItemListsController: RequestHandler = (_req, res) => {
     res.json({
         warframes: reduceItems(warframes),
-        weapons: reduceItems(weapons)
+        weapons: reduceItems(weapons.filter(item => item.productCategory != "OperatorAmps"))
     });
 };
 
diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index 43675663..d199ccb4 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -178,7 +178,7 @@ export const addWeapon = async (
             weaponIndex = inventory.Melee.push({ ItemType: weaponName, Configs: [], XP: 0 });
             break;
         default:
-            throw new Error("unknown weapon type");
+            throw new Error("unknown weapon type: " + weaponType);
     }
 
     const changedInventory = await inventory.save();