diff --git a/src/Dodge/Creature.hs b/src/Dodge/Creature.hs
index be8482d80..f0f03753b 100644
--- a/src/Dodge/Creature.hs
+++ b/src/Dodge/Creature.hs
@@ -172,7 +172,8 @@ inventoryA = IM.fromList $ zip [0..]
     ]
 inventoryB :: IM.IntMap Item
 inventoryB = IM.fromList $ zip [0..] 
-    [ wristArmour
+    [ forceFieldGun
+    , wristArmour
     , wristArmour
     , autoRifle
     , smg
diff --git a/src/Dodge/Data.hs b/src/Dodge/Data.hs
index ba785422d..00e119592 100644
--- a/src/Dodge/Data.hs
+++ b/src/Dodge/Data.hs
@@ -136,10 +136,10 @@ data World = World
     , _doubleMouseHammer    :: HammerPosition
     }
 
-data HUDElement = DisplayInventory {_subInventory :: SubInventory}
+data HUDElement 
+    = DisplayInventory {_subInventory :: SubInventory}
     | DisplayCarte
 --  deriving (Eq,Ord,Show)
-
 data RightButtonOptions
     = NoRightButtonOptions
     | EquipOptions 
@@ -149,13 +149,11 @@ data RightButtonOptions
         ,_opAllocateEquipment :: AllocateEquipment
         ,_opActivateEquipment :: ActivateEquipment
         }
-
 data ActivateEquipment
     = ActivateEquipment {_activateEquipment :: Int }
     | DeactivateEquipment {_deactivateEquipment :: Int}
     | ActivateDeactivateEquipment {_activateEquipment :: Int ,_deactivateEquipment :: Int}
     | NoChangeActivateEquipment
-
 data AllocateEquipment 
     = DoNotMoveEquipment
     | PutOnEquipment
@@ -487,18 +485,17 @@ data Item = Item
     , _itTargeting  :: Targeting
     , _itDimension  :: ItemDimension
     , _itCurseStatus :: CurseStatus
-    , _itParams     :: ItemParams
     , _itTweaks     :: ItemTweaks
     , _itModules    :: M.Map ModuleSlot ItemModule
     , _itScope      :: Scope
     , _itValue      :: ItemValue
+    , _itParams     :: ItemParams
     }
 data ItemValue = ItemValue
     { _ivInt :: Int
     , _ivType :: ItemValueType
     }
 data ItemValueType = MundaneItem | ArtefactItem
-
 data Targeting
     = NoTargeting
     | Targeting
@@ -570,6 +567,11 @@ data ItEffect
         {_itInvEffect       :: Item -> Creature -> World -> World
         ,_itEffectID   :: Maybe Int
         }
+    | ItInvEffectDrop
+        { _itInvEffect  :: Item -> Creature -> World -> World
+        , _itEffectDrop    :: Item -> Creature -> World -> World
+        , _itEffectMID     :: Maybe Int
+        }
 data IntID a = IntID Int a
 
 data WorldBeams = WorldBeams
@@ -780,6 +782,7 @@ data ItemParams
             -> State StdGen (Maybe ArcStep)
         , _previousArcEffect :: PreviousArcEffect
         }
+    | ParamMID {_paramMID :: Maybe Int}
 data ArcStep = ArcStep
     { _asPos :: Point2
     , _asDir :: Float
diff --git a/src/Dodge/Inventory.hs b/src/Dodge/Inventory.hs
index 5a338ef54..11f167054 100644
--- a/src/Dodge/Inventory.hs
+++ b/src/Dodge/Inventory.hs
@@ -57,6 +57,7 @@ rmInvItem cid invid w = case w ^? creatures . ix cid . crInv . ix invid . itCons
         & creatures . ix cid . crLeftInvSel %~ g'
         & removeAnySlotEquipment
         & dounequipfunction
+        & doanyitemeffect
         & creatures . ix cid . crInvEquipped %~ IM.delete invid
         & creatures . ix cid . crInvEquipped %~ IM.mapKeys g
                 -- TODO check whether this can be mapKeysMonotonic
@@ -66,6 +67,9 @@ rmInvItem cid invid w = case w ^? creatures . ix cid . crInv . ix invid . itCons
     dounequipfunction = fromMaybe id $ do
         rmf <- itm ^? itUse . eqOnRemove
         return $ rmf itm cr
+    doanyitemeffect = fromMaybe id $ do
+        rmf <- itm ^? itEffect . itEffectDrop
+        return $ rmf itm cr
     removeAnySlotEquipment = case w ^? creatures . ix cid . crInvEquipped . ix invid of
         Just epos   -> creatures . ix cid . crEquipment . at epos .~ Nothing
         Nothing     -> id
diff --git a/src/Dodge/Item/Equipment.hs b/src/Dodge/Item/Equipment.hs
index 5c4d32f56..054403c5d 100644
--- a/src/Dodge/Item/Equipment.hs
+++ b/src/Dodge/Item/Equipment.hs
@@ -103,8 +103,10 @@ setWristShieldPos itm cr w = w
     invid = fromJust (_itInvPos itm)
     --wlline = (V2 10 0, V2 (-10) 100)
     handtrans = case cr ^? crInvEquipped . ix invid of
-        Just OnLeftWrist -> translatePointToLeftHand
+        Just OnLeftWrist -> \cr' -> translatePointToLeftHand cr' . g
         _ -> translatePointToRightHand
+    g | twists cr = (+.+.+ V3 (-5) 10 0)
+      | otherwise = id
     f = (+.+ _crPos cr) . stripZ . rotate3 (_crDir cr) . handtrans cr
 
 spicForWrist :: SPic -> Creature -> Item -> SPic
diff --git a/src/Dodge/Item/Weapon/Utility.hs b/src/Dodge/Item/Weapon/Utility.hs
index 6731e6321..c50c8ed07 100644
--- a/src/Dodge/Item/Weapon/Utility.hs
+++ b/src/Dodge/Item/Weapon/Utility.hs
@@ -1,15 +1,18 @@
 module Dodge.Item.Weapon.Utility where
 import Dodge.Data
---import Dodge.Base
+import Dodge.Base.Coordinate
 import Dodge.Default
 --import Dodge.Picture.Layer
 import Dodge.Creature.Action
 import Dodge.Item.Weapon.TriggerType
+import Dodge.Item.Weapon.ExtraEffect
 import Dodge.Default.Weapon
+import Dodge.Wall.ForceField
+import Dodge.Wall.Move
 --import Sound.Data
 import Geometry
 import Picture
---import qualified IntMapHelp as IM
+import qualified IntMapHelp as IM
 import Shape
 import ShapePicture
 
@@ -134,9 +137,23 @@ forceFieldGun = defaultGun
         , _reloadTime = 40
         , _reloadState = Nothing'
         }
-    , _itUse = undefined
+    , _itUse = ruseInstant useForceFieldGun (HasHammer HammerUp)
+        [ hammerCheckI , ammoCheckI , useAmmoAmount 1]
 --    , _itFloorPict = \_ -> (,) emptySH $ onLayer FlItLayer $ polygon $ map toV2 [(-4,-4),(-4,4),(4,4),(4,0),(0,0),(0,-4)]
+    , _itTargeting = targetRBPress
+    , _itParams = ParamMID Nothing
     }
+
+useForceFieldGun :: Item -> Creature -> World -> World
+useForceFieldGun itm cr w = w
+    & walls %~ IM.insertWith (\_ x -> x) i forceField {_wlID = i}
+    & creatures . ix (_crID cr) . crInv . ix (fromJust (_itInvPos itm)) . itParams . paramMID ?~ i
+    & moveWallIDUnsafe i wlline
+  where
+    i = fromMaybe (IM.newKey (_walls w)) $ itm ^? itParams . paramMID . _Just
+    a = fromJust . _tgPos $ _itTargeting itm
+    wlline = (a,mouseWorldPos w)
+
 -- grapGun = defaultGun 
 --     { _itName = "grapGun"
 --     , _itIdentity = GrapGun
diff --git a/src/Dodge/Render/ShapePicture.hs b/src/Dodge/Render/ShapePicture.hs
index 3d74c466b..593fb0681 100644
--- a/src/Dodge/Render/ShapePicture.hs
+++ b/src/Dodge/Render/ShapePicture.hs
@@ -127,7 +127,7 @@ drawWallIDs cfig w
             . text 
             $ show $ _wlID wl 
       where
-        p = worldPosToScreen w $ 0.5 *.* ( uncurry (+.+) $ _wlLine wl)
+        p = worldPosToScreen w $ 0.5 *.* uncurry (+.+) (_wlLine wl)
 
 drawPathing :: Configuration -> World -> Picture
 drawPathing cfig w
diff --git a/src/Dodge/Wall/ForceField.hs b/src/Dodge/Wall/ForceField.hs
new file mode 100644
index 000000000..9b0365018
--- /dev/null
+++ b/src/Dodge/Wall/ForceField.hs
@@ -0,0 +1,17 @@
+module Dodge.Wall.ForceField where
+import Dodge.Data
+import Dodge.Default.Wall
+import Color
+
+forceField :: Wall
+forceField = defaultWall
+    {_wlColor = orange
+    ,_wlOpacity = SeeAbove
+    ,_wlPathable = True
+    ,_wlWalkable = True
+    ,_wlFireThrough = True
+    ,_wlReflect = True
+    ,_wlDraw = True
+    ,_wlRotateTo = False
+    ,_wlStructure = StandaloneWall
+    }