diff --git a/src/Dodge/Data.hs b/src/Dodge/Data.hs
index 0ff05c83e..c8c972c8f 100644
--- a/src/Dodge/Data.hs
+++ b/src/Dodge/Data.hs
@@ -344,7 +344,7 @@ data Item
         , _itTargeting :: Maybe (World -> Maybe Point2, Int -> Item -> Creature -> World -> Picture)
         , _itDimension  :: ItemDimension
         , _itCurseStatus :: CurseStatus
-        , _itType   :: ItemType
+        , _itParams     :: ItemParams
         }
     | Consumable
         { _itName :: String
@@ -516,6 +516,23 @@ data AmmoType
     | DroneAmmo
         { _amString :: String }
     | GenericAmmo
+data ItemParams
+    = UtilityItem
+    | NoParams
+    | ShellLauncher
+        { _launchParams :: [PjParam]
+        }
+    | MultiBarrel
+        { _barrelSpread :: BarrelSpread
+        , _barrelNum    :: Int
+        }
+    | SingleBarrel
+        {_inaccuracy :: Float}
+    | AngleWalk
+        { _maxWalkAngle :: Float
+        , _currentWalkAngle :: Float
+        , _walkSpeed :: Float
+        }
 data PjParam = PjParam
     { _pjMoveParam :: Int -> Item -> Creature -> Prop -> World -> World
     , _pjIntParam  :: Int
@@ -877,3 +894,4 @@ makeLenses ''ItemDimension
 makeLenses ''Vocalization
 makeLenses ''Universe
 makeLenses ''LSParam
+makeLenses ''ItemParams
diff --git a/src/Dodge/Default/Weapon.hs b/src/Dodge/Default/Weapon.hs
index 517f6dcd2..a7062488d 100644
--- a/src/Dodge/Default/Weapon.hs
+++ b/src/Dodge/Default/Weapon.hs
@@ -99,11 +99,7 @@ defaultGun = Weapon
     , _itInvDisplay = basicWeaponDisplay
     , _itInvColor = white
     , _itTargeting = Nothing
-    , _itType = Weapon'
-        { _wpSpread = 0.02
-        , _wpRange = 20
-        , _wpNumBarrels = 1
-        }
+    , _itParams = NoParams
     , _itDimension = defaultItemDimension
     }
 defaultItemDimension :: ItemDimension
diff --git a/src/Dodge/Item/Data.hs b/src/Dodge/Item/Data.hs
index 81ae2dfa8..137820642 100644
--- a/src/Dodge/Item/Data.hs
+++ b/src/Dodge/Item/Data.hs
@@ -82,16 +82,12 @@ data UseDelay -- should just be Delay
         {_warmTime :: Int
         ,_warmMax  :: Int
         }
-data ItemType
-    = Weapon'
-        { _wpSpread     :: Float
-        , _wpRange      :: Float
-        , _wpNumBarrels :: Int
-        }
-    | UtilityItem
-    | ConsumableItem
+data BarrelSpread
+    = AlignedBarrels
+    | SpreadBarrels   {_spreadAngle :: Float}
+    | RotatingBarrels {_rotatingBarrelAccuracy :: Float}
+makeLenses ''BarrelSpread
 makeLenses ''HammerType
 makeLenses ''ItZoom
 makeLenses ''AimParams
 makeLenses ''UseDelay
-makeLenses ''ItemType
diff --git a/src/Dodge/Item/Weapon/BatteryGuns.hs b/src/Dodge/Item/Weapon/BatteryGuns.hs
index 948934e6e..2697befdb 100644
--- a/src/Dodge/Item/Weapon/BatteryGuns.hs
+++ b/src/Dodge/Item/Weapon/BatteryGuns.hs
@@ -52,7 +52,7 @@ teslaGun = defaultGun
         & useAim . aimStance .~ TwoHandFlat
     , _itFloorPict = teslaGunPic
 --    , _itZoom = defaultItZoom
-    } & itType . wpSpread .~ 0.001
+    }
 teslaGunPic :: Item -> SPic
 teslaGunPic _ = noPic $ colorSH blue $
         upperPrismPoly 5 (rectNESW xb    y xa    (-y))
diff --git a/src/Dodge/Item/Weapon/Booster.hs b/src/Dodge/Item/Weapon/Booster.hs
index b4167f06b..eb1cd2ef5 100644
--- a/src/Dodge/Item/Weapon/Booster.hs
+++ b/src/Dodge/Item/Weapon/Booster.hs
@@ -121,7 +121,6 @@ boosterGun = defaultGun
     , _itUse = luseInstantNoH $ boostSelfL 10
     , _itFloorPict = \_ -> (,) emptySH $ onLayer FlItLayer $ polygon $ map toV2 [(-2,-2),(-2,2),(2,2),(2,0),(0,0),(0,-2)]
     , _itEffect = resetAttachmentID
-    , _itType = UtilityItem
     }
 resetAttachmentID :: ItEffect
 resetAttachmentID = ItInvEffect f 0
diff --git a/src/Dodge/Item/Weapon/BulletGuns.hs b/src/Dodge/Item/Weapon/BulletGuns.hs
index 5082312be..8ac0b7c50 100644
--- a/src/Dodge/Item/Weapon/BulletGuns.hs
+++ b/src/Dodge/Item/Weapon/BulletGuns.hs
@@ -67,7 +67,8 @@ autoGun = defaultAutoGun
     , _itAttachment = ItCharMode $ Seq.fromList "MS"
     , _itScroll   = scrollCharMode
     , _itInvDisplay = basicWeaponDisplay
-    } & itType .  wpSpread .~ autogunSpread
+    , _itParams = SingleBarrel autogunSpread
+    }
 autoGunPic :: Item -> SPic
 autoGunPic it = noPic $
      colorSH red (prismPoly 
@@ -94,7 +95,7 @@ pistol = defaultGun
         , useTimeCheck
         , withSoundStart tap3S 
         , useAmmo 1
-        , randSpreadDir
+        , applyInaccuracy
         , withMuzFlareI
         ]
     , _itFloorPict = pistolPic
@@ -104,6 +105,7 @@ pistol = defaultGun
     , _itInvDisplay = basicWeaponDisplay
     , _itInvColor = white
     , _itTargeting = Nothing
+    , _itParams = SingleBarrel 0.05
     }
 pistolPic :: Item -> SPic
 pistolPic it = noPic $ colorSH green (prismPoly 
@@ -169,16 +171,15 @@ ltAutoGun = defaultAutoGun
         , useTimeCheck
         , withSoundStart tap1S
         , useAmmo 1
-        , withRandomDirI 0.1
+        , applyInaccuracy
         , torqueAfterI 0.2
         , withSidePushI 50
         , modClock 2 withMuzFlareI
         ]
     , _itFloorPict = ltAutoGunPic
---    , _itZoom = defaultItZoom
+    , _itParams = SingleBarrel 0.1
     }
     & itDimension . muzzleLength .~ 10 
-    & itType . wpSpread .~ 0.5
 ltAutoGunPic :: Item -> SPic
 ltAutoGunPic it = 
     ( colorSH green $ prismPoly 
@@ -298,9 +299,12 @@ spreadGun = defaultGun
         , withMuzFlareI
         , spreadNumI
         ]
+    , _itParams = MultiBarrel 
+        {_barrelNum = 5
+        ,_barrelSpread = SpreadBarrels 0.5
+        }
     , _itFloorPict = spreadGunPic
-    } & itType . wpSpread .~ spreadGunSpread
-     &  itType . wpNumBarrels .~ 50
+    }
 spreadGunPic :: Item -> SPic
 spreadGunPic it = 
     ( colorSH green (upperPrismPoly 5 $ map toV2[(-3,0),(3,6),(3,-6)])
@@ -334,8 +338,11 @@ multGun = defaultGun
         & useAim . aimStance .~ TwoHandTwist
         & useAim . aimZoom .~ defaultItZoom {_itZoomFac = 1.5}
     , _itFloorPict = multGunSPic
---    , _itZoom       = defaultItZoom
-    } & itType . wpNumBarrels .~ 5
+    , _itParams = MultiBarrel 
+        {_barrelNum = 5
+        ,_barrelSpread = AlignedBarrels
+        }
+    }
 multGunSPic :: Item -> SPic
 multGunSPic it = 
     ( colorSH red (
@@ -381,7 +388,7 @@ longGun = defaultGun
     , _itScroll = zoomLongGun
     , _itAttachment = ItScope (V2 0 0) 0 1 False
     , _itEffect = itemLaserScopeEffect
-    } & itType . wpRange .~ 200
+    }
 longGunSPic :: Item -> SPic
 longGunSPic _ =
     ( colorSH orange $ upperPrismPoly 5 $ rectWH 12 2
diff --git a/src/Dodge/Item/Weapon/SprayGuns.hs b/src/Dodge/Item/Weapon/SprayGuns.hs
index 67f86e307..95e8c8907 100644
--- a/src/Dodge/Item/Weapon/SprayGuns.hs
+++ b/src/Dodge/Item/Weapon/SprayGuns.hs
@@ -48,13 +48,10 @@ poisonSprayer = defaultAutoGun
         & useAim . aimSpeed .~ 0.2
         & useAim . aimRange .~ 0
         & useAim . aimStance .~ TwoHandTwist
-    , _itType = Weapon'
-        { _wpRange = 8
-        , _wpSpread = 0.1
-        , _wpNumBarrels = 3
-        }
+    , _itParams = MultiBarrel {_barrelSpread = SpreadBarrels 0.2
+            , _barrelNum = 3
+            }
     , _itFloorPict = flamerPic
---    , _itZoom = defaultItZoom
     }
 flamer :: Item
 flamer = defaultAutoGun 
@@ -65,7 +62,7 @@ flamer = defaultAutoGun
         , _wpLoadedAmmo = 250
         , _wpReloadTime = 100
         }
-    , _itUse = ruseInstant (\_ -> randWalkAngle 0.2 0.01 aFlame) NoHammer
+    , _itUse = ruseInstant (\_ -> randWalkAngle aFlame) NoHammer
         [ ammoCheckI
         , useAmmo 1
         , withSidePushI 5
@@ -78,7 +75,12 @@ flamer = defaultAutoGun
     , _itFloorPict = flamerPic
 --    , _itZoom       = defaultItZoom
     , _itAttachment = NoItAttachment
-    } & itType . wpRange .~ 8
+    , _itParams = AngleWalk
+        {_maxWalkAngle = 0.2
+        ,_walkSpeed = 0.01
+        ,_currentWalkAngle = 0
+        }
+    }
 flamerPic :: Item -> SPic
 flamerPic it = 
     ( colorSH yellow $ 
diff --git a/src/Dodge/Item/Weapon/TriggerType.hs b/src/Dodge/Item/Weapon/TriggerType.hs
index fc12ab564..38418de3f 100644
--- a/src/Dodge/Item/Weapon/TriggerType.hs
+++ b/src/Dodge/Item/Weapon/TriggerType.hs
@@ -32,7 +32,7 @@ module Dodge.Item.Weapon.TriggerType
     , shootL
     , useTimeCheck
     , ammoCheckI
-    , randSpreadDir
+    , applyInaccuracy
     , modClock
     )
     where
@@ -316,11 +316,11 @@ withMuzFlareI f it cr w = makeTlsTimeRadColPos 3 100 (V3 1 1 0.5) flashPos
     dir = _crDir cr
     itLength = _muzzleLength $ _itDimension it
 {- | Applies the effect to a randomly rotated creature,
- - rotation amount given by wpSpread  -}
-randSpreadDir :: ChainEffect
-randSpreadDir f it cr w = f it (cr & crDir +~ a) $ set randGen g w
+ - rotation amount given by inaccuracy in itParams  -}
+applyInaccuracy :: ChainEffect
+applyInaccuracy f it cr w = f it (cr & crDir +~ a) $ set randGen g w
   where 
-    acc = _wpSpread $ _itType it
+    acc = _inaccuracy $ _itParams it
     (a, g) = randomR (-acc,acc) $ _randGen w
 {- | Applies the effect to a randomly rotated creature.  -}
 withRandomDirI
@@ -391,8 +391,8 @@ spreadNumI eff item cr w = foldr f w dirs
         [-spread,-spread+(2*spread/fromIntegral numBul)..spread]
         (randomRs (0,spread/fromIntegral numBul) (_randGen w))
     f dir = eff item (cr & crDir +~ dir)
-    spread = _wpSpread $ _itType item
-    numBul = _wpNumBarrels $ _itType item
+    spread = _spreadAngle . _barrelSpread $ _itParams item
+    numBul = _barrelNum $ _itParams item
 numI :: ChainEffect
 numI eff item cr w = foldr f w poss
   where
@@ -401,21 +401,22 @@ numI eff item cr w = foldr f w poss
     poss :: [V2 Float]
     poss = map (rotateV (_crDir cr) . V2 0 . (*5) . (+ cp) . fromIntegral) [0 .. numBul - 1]
     f pos = eff item (cr & crPos %~ (+.+ pos))
-    numBul = _wpNumBarrels $ _itType item
+    numBul = _barrelNum $ _itParams item
 {- | Uses '_wpSpread' as a parameter for the current offset angle. -}
 randWalkAngle 
-    :: Float    -- ^ Max offset angle
-    -> Float    -- ^ Walk speed
-    -> (Creature -> World -> World)  -- ^ Underlying effect
+    :: (Creature -> World -> World)  -- ^ Underlying effect
     -> Creature      -- ^ Creature id
     -> World 
     -> World
-randWalkAngle ma aspeed f cr w = w
+randWalkAngle f cr w = w
     & f (cr & crDir +~ a)
-    & creatures . ix cid . crInv . ix i . itType . wpSpread .~ newa
+    & creatures . ix cid . crInv . ix i . itParams . currentWalkAngle .~ newa
   where
     cid = _crID cr
-    a = _wpSpread $ _itType $ _crInv (_creatures w IM.! cid) IM.! i
+    a = _currentWalkAngle $ _itParams it
     (walka, _) = randomR (-aspeed,aspeed) (_randGen w)
     newa = min ma $ max (negate ma) (a + walka)
     i = _crInvSel $ _creatures w IM.! cid
+    it = _crInv cr IM.! i
+    ma     = _maxWalkAngle $ _itParams it
+    aspeed = _walkSpeed $ _itParams it
diff --git a/src/Dodge/Item/Weapon/Utility.hs b/src/Dodge/Item/Weapon/Utility.hs
index 77edab8e2..363f7a793 100644
--- a/src/Dodge/Item/Weapon/Utility.hs
+++ b/src/Dodge/Item/Weapon/Utility.hs
@@ -63,7 +63,6 @@ shrinkGun = defaultGun
         }
     , _itUse = defaultlUse {_lUse = hammerCheckL useShrinkGun}
             & useHammer .~ upHammer
-    , _itType = UtilityItem
     , _itFloorPict = shrinkGunPic
     , _itAttachment = ItBool True
     }
@@ -95,7 +94,6 @@ blinkGun = defaultGun
     , _itUse = defaultlUse 
         {_lUse = hammerCheckL $ shootL aSelfL
         } & useHammer .~ upHammer
-    , _itType = UtilityItem
     , _itFloorPict = const . noPic . colorSH chartreuse $ upperPrismPoly 2 $ square 2
     }