diff --git a/src/controllers/api/modularWeaponCraftingController.ts b/src/controllers/api/modularWeaponCraftingController.ts
index d70f48cad..4be0d980b 100644
--- a/src/controllers/api/modularWeaponCraftingController.ts
+++ b/src/controllers/api/modularWeaponCraftingController.ts
@@ -2,7 +2,14 @@ import { RequestHandler } from "express";
 import { getAccountIdForRequest } from "@/src/services/loginService";
 import { getJSONfromString } from "@/src/helpers/stringHelpers";
 import { TEquipmentKey } from "@/src/types/inventoryTypes/inventoryTypes";
-import { getInventory, updateCurrency, addEquipment, addMiscItems } from "@/src/services/inventoryService";
+import {
+    getInventory,
+    updateCurrency,
+    addEquipment,
+    addMiscItems,
+    applyDefaultUpgrades
+} from "@/src/services/inventoryService";
+import { ExportWeapons } from "warframe-public-export-plus";
 
 const modularWeaponTypes: Record<string, TEquipmentKey> = {
     "/Lotus/Weapons/SolarisUnited/Primary/LotusModularPrimary": "LongGuns",
@@ -36,8 +43,11 @@ export const modularWeaponCraftingController: RequestHandler = async (req, res)
     const category = modularWeaponTypes[data.WeaponType];
     const inventory = await getInventory(accountId);
 
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    const configs = applyDefaultUpgrades(inventory, ExportWeapons[data.Parts[0]]?.defaultUpgrades);
+
     // Give weapon
-    const weapon = addEquipment(inventory, category, data.WeaponType, data.Parts);
+    const inventoryChanges = addEquipment(inventory, category, data.WeaponType, data.Parts, {}, { Configs: configs });
 
     // Remove credits & parts
     const miscItemChanges = [];
@@ -58,8 +68,8 @@ export const modularWeaponCraftingController: RequestHandler = async (req, res)
     // Tell client what we did
     res.json({
         InventoryChanges: {
+            ...inventoryChanges,
             ...currencyChanges,
-            [category]: [weapon],
             MiscItems: miscItemChanges
         }
     });
diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index 7977818aa..1f895825f 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -52,6 +52,7 @@ import {
     ExportSyndicates,
     ExportUpgrades,
     ExportWeapons,
+    IDefaultUpgrade,
     TStandingLimitBin
 } from "warframe-public-export-plus";
 import { createShip } from "./shipService";
@@ -532,6 +533,28 @@ export const addItems = async (
     return inventoryChanges;
 };
 
+export const applyDefaultUpgrades = (
+    inventory: TInventoryDatabaseDocument,
+    defaultUpgrades: IDefaultUpgrade[] | undefined
+): IItemConfig[] => {
+    const modsToGive: IRawUpgrade[] = [];
+    const configs: IItemConfig[] = [];
+    if (defaultUpgrades) {
+        const upgrades = [];
+        for (const defaultUpgrade of defaultUpgrades) {
+            modsToGive.push({ ItemType: defaultUpgrade.ItemType, ItemCount: 1 });
+            if (defaultUpgrade.Slot != -1) {
+                upgrades[defaultUpgrade.Slot] = defaultUpgrade.ItemType;
+            }
+        }
+        if (upgrades.length != 0) {
+            configs.push({ Upgrades: upgrades });
+        }
+    }
+    addMods(inventory, modsToGive);
+    return configs;
+};
+
 //TODO: maybe genericMethod for all the add methods, they share a lot of logic
 export const addSentinel = (
     inventory: TInventoryDatabaseDocument,
@@ -543,23 +566,9 @@ export const addSentinel = (
         addSentinelWeapon(inventory, ExportSentinels[sentinelName].defaultWeapon, inventoryChanges);
     }
 
-    const modsToGive: IRawUpgrade[] = [];
-    const configs: IItemConfig[] = [];
     // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
-    if (ExportSentinels[sentinelName]?.defaultUpgrades) {
-        const upgrades = [];
-        for (const defaultUpgrade of ExportSentinels[sentinelName].defaultUpgrades) {
-            modsToGive.push({ ItemType: defaultUpgrade.ItemType, ItemCount: 1 });
-            if (defaultUpgrade.Slot != -1) {
-                upgrades[defaultUpgrade.Slot] = defaultUpgrade.ItemType;
-            }
-        }
-        if (upgrades.length != 0) {
-            configs.push({ Upgrades: upgrades });
-        }
-    }
+    const configs: IItemConfig[] = applyDefaultUpgrades(inventory, ExportSentinels[sentinelName]?.defaultUpgrades);
 
-    addMods(inventory, modsToGive);
     const sentinelIndex = inventory.Sentinels.push({ ItemType: sentinelName, Configs: configs, XP: 0 }) - 1;
     inventoryChanges.Sentinels ??= [];
     inventoryChanges.Sentinels.push(inventory.Sentinels[sentinelIndex].toJSON<IEquipmentClient>());