diff --git a/src/lib/components/ShipEdit/Weaponry/Weapon/Needle.svelte b/src/lib/components/ShipEdit/Weaponry/Weapon/Needle.svelte
index 6dd2a57..cdb17fd 100644
--- a/src/lib/components/ShipEdit/Weaponry/Weapon/Needle.svelte
+++ b/src/lib/components/ShipEdit/Weaponry/Weapon/Needle.svelte
@@ -1,6 +1,6 @@
 <label>needle weapon</label>
 
-<Arcs selected={arcs} on:click_arc={({ detail }) => click_arc(detail)} />
+<Arcs selected={[arc]} on:click_arc={({ detail }) => click_arc(detail)} />
 
 <script>
   import { getContext } from "svelte";
@@ -9,18 +9,13 @@
 
   const all_arcs = ["FS", "F", "FP", "AP", "A", "AS"];
 
-  export let arcs = ["F"];
-
-  const click_arc = (arc) => {
-      console.log(arc);
-      return;
-    if (arcs[0] === arc) return;
-    arcs = [arc];
-  };
+  export let arc = "F";
 
   const dispatch = createEventDispatcher();
 
-  $: dispatch("change", { arcs });
+  const click_arc = (arc) => {
+        dispatch("change",{arc});
+  };
 </script>
 
 <style>
diff --git a/src/lib/shipDux/weaponry/weapons.js b/src/lib/shipDux/weaponry/weapons.js
index 575b7cc..54f8c1b 100644
--- a/src/lib/shipDux/weaponry/weapons.js
+++ b/src/lib/shipDux/weaponry/weapons.js
@@ -8,7 +8,8 @@ export const weaponTypes = [
     { name: 'submunition pack', type: 'submunition', reqs: { mass:1, cost:3 }},
     { name: 'point defence system', type: 'pds', reqs: {mass:1,cost:3}},
     { name: 'scattergun', type: 'scattergun', reqs: { mass:1,cost:4 }},
-    { name: 'needle weapon', type: 'needle', reqs: { mass: 2, cost: 6 }},
+    { name: 'needle weapon', type: 'needle', reqs: { mass: 2, cost: 6 },
+        initial: { arc: 'F' }},
 ];
 
 const dux = new Updux({
@@ -16,12 +17,17 @@ const dux = new Updux({
     actions: {
         addWeapon: null,
         removeWeapon: null,
+        setWeapon: null,
     },
 });
 
+dux.setMutation('setWeapon', ({id,...rest}) =>
+    u.map( u.if( (w) => w.id === id, { ...rest }))
+);
+
 dux.setMutation('removeWeapon', id => state => [
     ...state.filter( (w) => w.id !== id   )
-])
+]);
 
 dux.setMutation('addWeapon', type => state => {
     return [
@@ -30,6 +36,7 @@ dux.setMutation('addWeapon', type => state => {
             id: state.length === 0 ? 1 : state[state.length -1]+1,
             type,
             reqs: weaponReqs({type}),
+            ...weaponTypes.find(w => w.type === type ).initial,
         }
     ]
 });