diff --git a/core/attachments.py b/core/attachments.py
index 008e569..da3a7a9 100644
--- a/core/attachments.py
+++ b/core/attachments.py
@@ -14,7 +14,7 @@ class Attachment:
     name: str
     item_id: str
     decay_pec: Decimal
-    attachment_type: str  # e.g., 'amplifier', 'scope', 'absorber'
+    attachment_type: str = ""  # e.g., 'amplifier', 'scope', 'absorber'
     
     # Effects
     damage_bonus: Decimal = Decimal('0')