diff --git a/src/Dodge/Data/AmmoType.hs b/src/Dodge/Data/AmmoType.hs
new file mode 100644
index 000000000..1a890d818
--- /dev/null
+++ b/src/Dodge/Data/AmmoType.hs
@@ -0,0 +1,20 @@
+{-# LANGUAGE StrictData #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+module Dodge.Data.AmmoType where
+
+--import Data.Aeson
+--import Data.Aeson.TH
+
+data AmmoType
+    = LauncherAmmo
+    | BulletAmmo
+    | BeltBulletAmmo
+    | ElectricalAmmo
+    | DroneAmmo
+    | GasAmmo
+    | PrintMaterial
+    | ExplosivePutty
+    deriving (Eq, Ord, Show, Read) --Generic, Flat)
+
+--deriveJSON defaultOptions ''AmmoType
diff --git a/src/Dodge/Data/EquipType.hs b/src/Dodge/Data/EquipType.hs
new file mode 100644
index 000000000..25b32e082
--- /dev/null
+++ b/src/Dodge/Data/EquipType.hs
@@ -0,0 +1,30 @@
+{-# LANGUAGE LambdaCase #-}
+
+module Dodge.Data.EquipType (equipType) where
+
+import Control.Lens
+import Dodge.Data.Item
+
+equipType :: Item -> Maybe EquipType
+equipType itm = case itm ^. itType of
+    EQUIP eit -> Just $ eitType eit
+    _ -> Nothing
+
+eitType :: EquipItemType -> EquipType
+eitType = \case
+    MAGSHIELD -> GoesOnWrist
+    FLAMESHIELD -> GoesOnWrist
+    FRONTARMOUR -> GoesOnChest
+    WRISTARMOUR -> GoesOnWrist
+    INVISIBILITYEQUIPMENT x -> x
+    BRAINHAT -> GoesOnHead
+    HAT -> GoesOnHead
+    HEADLAMP -> GoesOnHead
+    POWERLEGS -> GoesOnLegs
+    SPEEDLEGS -> GoesOnLegs
+    JUMPLEGS -> GoesOnLegs
+    FUELPACK -> GoesOnBack
+    BULLETBELTPACK -> GoesOnBack
+    BULLETBELTBRACER -> GoesOnWrist
+    BATTERYPACK -> GoesOnBack
+    WRIST_ECG -> GoesOnWrist
diff --git a/src/Dodge/Item/AmmoSlots.hs b/src/Dodge/Item/AmmoSlots.hs
new file mode 100644
index 000000000..45640decf
--- /dev/null
+++ b/src/Dodge/Item/AmmoSlots.hs
@@ -0,0 +1,63 @@
+{-# LANGUAGE LambdaCase #-}
+
+module Dodge.Item.AmmoSlots (
+    itemAmmoSlots,
+) where
+
+import Dodge.Data.AmmoType
+import Dodge.Data.Item
+import qualified Data.IntMap.Strict as IM
+import Control.Lens
+
+itemAmmoSlots :: Item -> IM.IntMap AmmoType
+itemAmmoSlots itm = case itm ^. itType of
+    HELD hit -> heldItemAmmoSlots hit
+    DETECTOR _ -> singleAmmo ElectricalAmmo
+    _ -> mempty
+
+heldItemAmmoSlots :: HeldItemType -> IM.IntMap AmmoType
+heldItemAmmoSlots = \case
+    BANGSTICK _ -> singleAmmo BulletAmmo
+    PISTOL -> singleAmmo BulletAmmo
+    AUTOPISTOL -> singleAmmo BulletAmmo
+    MACHINEPISTOL -> singleAmmo BulletAmmo
+    SMG -> singleAmmo BulletAmmo
+    BANGCONE -> singleAmmo BulletAmmo
+    BLUNDERBUSS -> singleAmmo BulletAmmo
+    GRAPECANNON {} -> singleAmmo BulletAmmo
+    RIFLE -> singleAmmo BulletAmmo
+    AUTORIFLE -> singleAmmo BulletAmmo
+    BURSTRIFLE -> singleAmmo BulletAmmo
+    ALTERIFLE -> IM.fromList (zip [0..1] $ repeat BulletAmmo)
+    BANGROD -> singleAmmo BulletAmmo
+    ELEPHANTGUN -> singleAmmo BulletAmmo
+    AMR -> singleAmmo BulletAmmo
+    AUTOAMR -> singleAmmo BulletAmmo
+    SNIPERRIFLE -> singleAmmo BulletAmmo
+    MINIGUNX _ -> singleAmmo BeltBulletAmmo
+    VOLLEYGUN i -> IM.fromList (zip [0..i-1] $ repeat BulletAmmo)
+    POISONSPRAYER -> singleAmmo GasAmmo
+    FLAMETHROWER -> singleAmmo GasAmmo
+    FLAMETORRENT -> singleAmmo GasAmmo
+    FLAMESPITTER -> singleAmmo GasAmmo
+    FLAMEWALL -> singleAmmo GasAmmo
+    BLOWTORCH -> singleAmmo GasAmmo
+    LASER -> singleAmmo ElectricalAmmo
+    TESLAGUN -> singleAmmo ElectricalAmmo
+    SPARKGUN -> singleAmmo ElectricalAmmo
+    TRACTORGUN -> singleAmmo ElectricalAmmo
+    SHATTERGUN -> singleAmmo ElectricalAmmo
+    TORCH -> singleAmmo ElectricalAmmo
+    BLINKERUNSAFE -> singleAmmo ElectricalAmmo
+    BLINKER -> singleAmmo ElectricalAmmo
+    RLAUNCHER -> singleAmmo LauncherAmmo
+    GLAUNCHER -> singleAmmo LauncherAmmo
+    RLAUNCHERX i -> IM.fromList [(j, LauncherAmmo) | j <- [0 .. i -1]]
+    REWINDER -> singleAmmo ElectricalAmmo
+    TIMESTOPPER -> singleAmmo ElectricalAmmo
+    TIMESCROLLER -> singleAmmo ElectricalAmmo
+    FLATSHIELD -> mempty
+    KEYCARD _ -> mempty
+
+singleAmmo :: a -> IM.IntMap a
+singleAmmo x = IM.insert 0 x mempty
diff --git a/src/Dodge/Item/MagAmmoType.hs b/src/Dodge/Item/MagAmmoType.hs
new file mode 100644
index 000000000..8ff453fe9
--- /dev/null
+++ b/src/Dodge/Item/MagAmmoType.hs
@@ -0,0 +1,26 @@
+{-# LANGUAGE LambdaCase #-}
+
+module Dodge.Item.MagAmmoType (
+    magAmmoType,
+) where
+
+import Control.Lens
+import Dodge.Data.AmmoType
+import Dodge.Data.Item
+
+magAmmoType :: Item -> Maybe AmmoType
+magAmmoType itm = case itm ^. itType of
+    AMMOMAG amt -> Just $ mAT amt
+    EQUIP FUELPACK -> Just GasAmmo
+    EQUIP BULLETBELTPACK -> Just BeltBulletAmmo
+    EQUIP BULLETBELTBRACER -> Just BeltBulletAmmo
+    _ -> Nothing
+
+mAT :: AmmoMagType -> AmmoType
+mAT = \case
+    TINMAG -> BulletAmmo
+    DRUMMAG -> BulletAmmo
+    BELTMAG -> BeltBulletAmmo
+    SHELLMAG -> LauncherAmmo
+    BATTERY -> ElectricalAmmo
+    CHEMFUELPOUCH -> GasAmmo