diff --git a/src/controllers/api/evolveWeaponController.ts b/src/controllers/api/evolveWeaponController.ts
index e20ffa8d..3e70922c 100644
--- a/src/controllers/api/evolveWeaponController.ts
+++ b/src/controllers/api/evolveWeaponController.ts
@@ -9,27 +9,40 @@ export const evolveWeaponController: RequestHandler = async (req, res) => {
     const accountId = await getAccountIdForRequest(req);
     const inventory = await getInventory(accountId);
     const payload = getJSONfromString(String(req.body)) as IEvolveWeaponRequest;
-    console.assert(payload.Action == "EWA_INSTALL");
 
     const recipe = getRecipe(payload.Recipe)!;
-    addMiscItems(
-        inventory,
-        recipe.ingredients.map(x => ({ ItemType: x.ItemType, ItemCount: x.ItemCount * -1 }))
-    );
+    if (payload.Action == "EWA_INSTALL") {
+        addMiscItems(
+            inventory,
+            recipe.ingredients.map(x => ({ ItemType: x.ItemType, ItemCount: x.ItemCount * -1 }))
+        );
 
-    const item = inventory[payload.Category].find(item => item._id.toString() == (req.query.ItemId as string))!;
-    item.Features ??= 0;
-    item.Features |= EquipmentFeatures.INCARNON_GENESIS;
+        const item = inventory[payload.Category].find(item => item._id.toString() == (req.query.ItemId as string))!;
+        item.Features ??= 0;
+        item.Features |= EquipmentFeatures.INCARNON_GENESIS;
 
-    item.SkillTree = "0";
+        item.SkillTree = "0";
 
-    inventory.EvolutionProgress ??= [];
-    if (!inventory.EvolutionProgress.find(entry => entry.ItemType == payload.EvoType)) {
-        inventory.EvolutionProgress.push({
-            Progress: 0,
-            Rank: 1,
-            ItemType: payload.EvoType
-        });
+        inventory.EvolutionProgress ??= [];
+        if (!inventory.EvolutionProgress.find(entry => entry.ItemType == payload.EvoType)) {
+            inventory.EvolutionProgress.push({
+                Progress: 0,
+                Rank: 1,
+                ItemType: payload.EvoType
+            });
+        }
+    } else if (payload.Action == "EWA_UNINSTALL") {
+        addMiscItems(inventory, [
+            {
+                ItemType: recipe.resultType,
+                ItemCount: 1
+            }
+        ]);
+
+        const item = inventory[payload.Category].find(item => item._id.toString() == (req.query.ItemId as string))!;
+        item.Features! &= ~EquipmentFeatures.INCARNON_GENESIS;
+    } else {
+        throw new Error(`unexpected evolve weapon action: ${payload.Action}`);
     }
 
     await inventory.save();
@@ -37,7 +50,7 @@ export const evolveWeaponController: RequestHandler = async (req, res) => {
 };
 
 interface IEvolveWeaponRequest {
-    Action: "EWA_INSTALL";
+    Action: string;
     Category: WeaponTypeInternal;
     Recipe: string; // e.g. "/Lotus/Types/Items/MiscItems/IncarnonAdapters/UnlockerBlueprints/DespairIncarnonBlueprint"
     UninstallRecipe: "";