diff --git a/crates/hedz_reloaded/src/backpack/backpack_ui.rs b/crates/hedz_reloaded/src/backpack/backpack_ui.rs
deleted file mode 100644
index a6f8912..0000000
--- a/crates/hedz_reloaded/src/backpack/backpack_ui.rs
+++ /dev/null
@@ -1,39 +0,0 @@
-use super::UiHeadState;
-use bevy::prelude::*;
-
-pub static BACKPACK_HEAD_SLOTS: usize = 5;
-
-#[derive(Component, Default)]
-pub struct BackpackMarker;
-
-#[derive(Component, Default)]
-pub struct BackpackCountText;
-
-#[derive(Component, Default)]
-pub struct HeadSelector(pub usize);
-
-#[derive(Component, Default)]
-pub struct HeadImage(pub usize);
-
-#[derive(Component, Default)]
-pub struct HeadDamage(pub usize);
-
-#[derive(Component, Default, Debug, Reflect)]
-#[reflect(Component, Default)]
-pub struct BackpackUiState {
-    pub heads: [Option<UiHeadState>; 5],
-    pub scroll: usize,
-    pub count: usize,
-    pub current_slot: usize,
-    pub open: bool,
-}
-
-impl BackpackUiState {
-    pub fn relative_current_slot(&self) -> usize {
-        self.current_slot.saturating_sub(self.scroll)
-    }
-}
-
-pub fn plugin(app: &mut App) {
-    app.register_type::<BackpackUiState>();
-}
diff --git a/crates/hedz_reloaded/src/backpack/mod.rs b/crates/hedz_reloaded/src/backpack/mod.rs
index 836f730..d2f558e 100644
--- a/crates/hedz_reloaded/src/backpack/mod.rs
+++ b/crates/hedz_reloaded/src/backpack/mod.rs
@@ -6,13 +6,7 @@ use crate::{
     heads_database::HeadsDatabase,
 };
 use bevy::prelude::*;
-#[cfg(feature = "client")]
-use bevy_replicon::prelude::ClientTriggerExt;
 use serde::{Deserialize, Serialize};
-pub use ui_head_state::UiHeadState;
-
-pub mod backpack_ui;
-pub mod ui_head_state;
 
 #[derive(Component, Default, Reflect, Serialize, Deserialize, PartialEq)]
 #[reflect(Component)]
@@ -40,120 +34,15 @@ impl Backpack {
     }
 }
 
-#[derive(Event, Serialize, Deserialize)]
+#[derive(Event, Debug, Serialize, Deserialize)]
 pub struct BackpackSwapEvent(pub usize);
 
 pub fn plugin(app: &mut App) {
     app.register_type::<Backpack>();
 
-    app.add_plugins(backpack_ui::plugin);
-
-    #[cfg(feature = "client")]
-    app.add_systems(FixedUpdate, (backpack_inputs, sync_on_change));
-
     global_observer!(app, on_head_collect);
 }
 
-#[cfg(feature = "client")]
-fn backpack_inputs(
-    backpacks: Single<
-        (&Backpack, &mut backpack_ui::BackpackUiState),
-        With<crate::player::LocalPlayer>,
-    >,
-    mut backpack_inputs: MessageReader<crate::control::BackpackButtonPress>,
-    mut commands: Commands,
-    time: Res<Time>,
-) {
-    use crate::{control::BackpackButtonPress, protocol::PlaySound};
-
-    let (backpack, mut state) = backpacks.into_inner();
-
-    for input in backpack_inputs.read() {
-        match input {
-            BackpackButtonPress::Toggle => {
-                if state.count == 0 {
-                    return;
-                }
-
-                state.open = !state.open;
-                commands.trigger(PlaySound::Backpack { open: state.open });
-            }
-            BackpackButtonPress::Swap => {
-                if !state.open {
-                    return;
-                }
-
-                commands.client_trigger(BackpackSwapEvent(state.current_slot));
-            }
-            BackpackButtonPress::Left => {
-                if !state.open {
-                    return;
-                }
-
-                if state.current_slot > 0 {
-                    state.current_slot -= 1;
-
-                    commands.trigger(PlaySound::Selection);
-                    sync_backpack_ui(backpack, &mut state, time.elapsed_secs());
-                }
-            }
-            BackpackButtonPress::Right => {
-                if !state.open {
-                    return;
-                }
-
-                if state.current_slot < state.count.saturating_sub(1) {
-                    state.current_slot += 1;
-
-                    commands.trigger(PlaySound::Selection);
-                    sync_backpack_ui(backpack, &mut state, time.elapsed_secs());
-                }
-            }
-        }
-    }
-}
-
-#[cfg(feature = "client")]
-fn sync_on_change(
-    backpack: Query<Ref<Backpack>>,
-    mut state: Single<&mut backpack_ui::BackpackUiState>,
-    time: Res<Time>,
-) {
-    for backpack in backpack.iter() {
-        if backpack.is_changed() || backpack.reloading() {
-            sync_backpack_ui(&backpack, &mut state, time.elapsed_secs());
-        }
-    }
-}
-
-#[cfg(feature = "client")]
-fn sync_backpack_ui(backpack: &Backpack, state: &mut backpack_ui::BackpackUiState, time: f32) {
-    use crate::backpack::backpack_ui::BACKPACK_HEAD_SLOTS;
-
-    state.count = backpack.heads.len();
-
-    state.scroll = state
-        .scroll
-        .min(state.count.saturating_sub(BACKPACK_HEAD_SLOTS));
-
-    if state.current_slot >= state.scroll + BACKPACK_HEAD_SLOTS {
-        state.scroll = state.current_slot.saturating_sub(BACKPACK_HEAD_SLOTS - 1);
-    }
-    if state.current_slot < state.scroll {
-        state.scroll = state.current_slot;
-    }
-
-    for i in 0..BACKPACK_HEAD_SLOTS {
-        if let Some(head) = backpack.heads.get(i + state.scroll) {
-            use crate::backpack::ui_head_state::UiHeadState;
-
-            state.heads[i] = Some(UiHeadState::new(*head, time));
-        } else {
-            state.heads[i] = None;
-        }
-    }
-}
-
 fn on_head_collect(
     trigger: On<HeadCollected>,
     mut cmds: Commands,
diff --git a/crates/hedz_reloaded/src/backpack/ui_head_state.rs b/crates/hedz_reloaded/src/backpack/ui_head_state.rs
deleted file mode 100644
index 10e2f7f..0000000
--- a/crates/hedz_reloaded/src/backpack/ui_head_state.rs
+++ /dev/null
@@ -1,40 +0,0 @@
-use crate::heads::HeadState;
-use bevy::prelude::*;
-use serde::{Deserialize, Serialize};
-
-#[derive(Clone, Copy, Debug, PartialEq, Reflect, Default, Serialize, Deserialize)]
-pub struct UiHeadState {
-    pub head: usize,
-    pub health: f32,
-    pub ammo: f32,
-    pub reloading: Option<f32>,
-}
-
-impl UiHeadState {
-    pub fn damage(&self) -> f32 {
-        1. - self.health
-    }
-
-    pub fn ammo_used(&self) -> f32 {
-        1. - self.ammo
-    }
-
-    pub fn reloading(&self) -> Option<f32> {
-        self.reloading
-    }
-
-    pub fn new(value: HeadState, time: f32) -> Self {
-        let reloading = if value.has_ammo() {
-            None
-        } else {
-            Some((time - value.last_use) / value.reload_duration)
-        };
-
-        Self {
-            head: value.head,
-            ammo: value.ammo as f32 / value.ammo_max as f32,
-            health: value.health as f32 / value.health_max as f32,
-            reloading,
-        }
-    }
-}
diff --git a/crates/hedz_reloaded/src/client/aim/target_ui.rs b/crates/hedz_reloaded/src/client/aim/target_ui.rs
index e78b344..63f979a 100644
--- a/crates/hedz_reloaded/src/client/aim/target_ui.rs
+++ b/crates/hedz_reloaded/src/client/aim/target_ui.rs
@@ -1,6 +1,12 @@
 use crate::{
-    GameState, aim::AimTarget, backpack::UiHeadState, client::ui::HeadsImages, heads::ActiveHeads,
-    hitpoints::Hitpoints, loading_assets::UIAssets, npc::Npc, player::LocalPlayer,
+    GameState,
+    aim::AimTarget,
+    client::ui::{HeadsImages, UiHeadState},
+    heads::ActiveHeads,
+    hitpoints::Hitpoints,
+    loading_assets::UIAssets,
+    npc::Npc,
+    player::LocalPlayer,
 };
 use bevy::prelude::*;
 
diff --git a/crates/hedz_reloaded/src/client/backpack.rs b/crates/hedz_reloaded/src/client/backpack.rs
new file mode 100644
index 0000000..3046be3
--- /dev/null
+++ b/crates/hedz_reloaded/src/client/backpack.rs
@@ -0,0 +1,98 @@
+use crate::{
+    backpack::{Backpack, BackpackSwapEvent},
+    client::ui::{BACKPACK_HEAD_SLOTS, BackpackUiState, UiHeadState},
+    control::BackpackButtonPress,
+    player::LocalPlayer,
+    protocol::PlaySound,
+};
+use bevy::prelude::*;
+use bevy_replicon::prelude::ClientTriggerExt;
+
+pub fn plugin(app: &mut App) {
+    app.add_systems(FixedUpdate, (backpack_inputs, sync_on_change));
+}
+
+fn backpack_inputs(
+    backpack: Single<&Backpack, With<LocalPlayer>>,
+    mut state: ResMut<BackpackUiState>,
+    mut backpack_inputs: MessageReader<crate::control::BackpackButtonPress>,
+    mut commands: Commands,
+    time: Res<Time>,
+) {
+    for input in backpack_inputs.read() {
+        match input {
+            BackpackButtonPress::Toggle => {
+                if state.count == 0 {
+                    return;
+                }
+
+                state.open = !state.open;
+                commands.trigger(PlaySound::Backpack { open: state.open });
+            }
+            BackpackButtonPress::Swap => {
+                if !state.open {
+                    return;
+                }
+
+                commands.client_trigger(BackpackSwapEvent(state.current_slot));
+            }
+            BackpackButtonPress::Left => {
+                if !state.open {
+                    return;
+                }
+
+                if state.current_slot > 0 {
+                    state.current_slot -= 1;
+
+                    commands.trigger(PlaySound::Selection);
+                    sync_backpack_ui(&backpack, &mut state, time.elapsed_secs());
+                }
+            }
+            BackpackButtonPress::Right => {
+                if !state.open {
+                    return;
+                }
+
+                if state.current_slot < state.count.saturating_sub(1) {
+                    state.current_slot += 1;
+
+                    commands.trigger(PlaySound::Selection);
+                    sync_backpack_ui(&backpack, &mut state, time.elapsed_secs());
+                }
+            }
+        }
+    }
+}
+
+fn sync_on_change(
+    backpack: Single<Ref<Backpack>, With<LocalPlayer>>,
+    mut state: ResMut<BackpackUiState>,
+    time: Res<Time>,
+) {
+    if backpack.is_changed() || backpack.reloading() {
+        sync_backpack_ui(&backpack, &mut state, time.elapsed_secs());
+    }
+}
+
+fn sync_backpack_ui(backpack: &Backpack, state: &mut BackpackUiState, time: f32) {
+    state.count = backpack.heads.len();
+
+    state.scroll = state
+        .scroll
+        .min(state.count.saturating_sub(BACKPACK_HEAD_SLOTS));
+
+    if state.current_slot >= state.scroll + BACKPACK_HEAD_SLOTS {
+        state.scroll = state.current_slot.saturating_sub(BACKPACK_HEAD_SLOTS - 1);
+    }
+    if state.current_slot < state.scroll {
+        state.scroll = state.current_slot;
+    }
+
+    for i in 0..BACKPACK_HEAD_SLOTS {
+        if let Some(head) = backpack.heads.get(i + state.scroll) {
+            state.heads[i] = Some(UiHeadState::new(*head, time));
+        } else {
+            state.heads[i] = None;
+        }
+    }
+}
diff --git a/crates/hedz_reloaded/src/client/mod.rs b/crates/hedz_reloaded/src/client/mod.rs
index 0eb7974..75b6234 100644
--- a/crates/hedz_reloaded/src/client/mod.rs
+++ b/crates/hedz_reloaded/src/client/mod.rs
@@ -24,6 +24,7 @@ use bevy_trenchbroom::geometry::Brushes;
 
 pub mod aim;
 pub mod audio;
+mod backpack;
 pub mod control;
 pub mod debug;
 pub mod enemy;
@@ -47,6 +48,7 @@ pub fn plugin(app: &mut App) {
         steam::plugin,
         ui::plugin,
         settings::plugin,
+        backpack::plugin,
     ));
 
     app.add_systems(
diff --git a/crates/hedz_reloaded/src/client/ui/backpack_ui.rs b/crates/hedz_reloaded/src/client/ui/backpack_ui.rs
index 3da716d..caa006e 100644
--- a/crates/hedz_reloaded/src/client/ui/backpack_ui.rs
+++ b/crates/hedz_reloaded/src/client/ui/backpack_ui.rs
@@ -1,15 +1,47 @@
 use crate::{
     GameState, HEDZ_GREEN,
-    backpack::backpack_ui::{
-        BACKPACK_HEAD_SLOTS, BackpackCountText, BackpackMarker, BackpackUiState, HeadDamage,
-        HeadImage, HeadSelector,
-    },
-    client::ui::heads_ui::HeadsImages,
+    client::ui::heads_ui::{HeadsImages, UiHeadState},
     loading_assets::UIAssets,
 };
 use bevy::{ecs::spawn::SpawnIter, prelude::*};
 
+pub static BACKPACK_HEAD_SLOTS: usize = 5;
+
+#[derive(Component, Default)]
+pub struct BackpackMarker;
+
+#[derive(Component, Default)]
+pub struct BackpackCountText;
+
+#[derive(Component, Default)]
+pub struct HeadSelector(pub usize);
+
+#[derive(Component, Default)]
+pub struct HeadImage(pub usize);
+
+#[derive(Component, Default)]
+pub struct HeadDamage(pub usize);
+
+#[derive(Resource, Default, Debug, Reflect)]
+#[reflect(Resource)]
+pub struct BackpackUiState {
+    pub heads: [Option<UiHeadState>; 5],
+    pub scroll: usize,
+    pub count: usize,
+    pub current_slot: usize,
+    pub open: bool,
+}
+
+impl BackpackUiState {
+    pub fn relative_current_slot(&self) -> usize {
+        self.current_slot.saturating_sub(self.scroll)
+    }
+}
+
 pub fn plugin(app: &mut App) {
+    app.register_type::<BackpackUiState>();
+    app.init_resource::<BackpackUiState>();
+
     app.add_systems(OnEnter(GameState::Playing), setup);
     app.add_systems(
         FixedUpdate,
@@ -152,10 +184,14 @@ fn spawn_head_ui(
 }
 
 fn update_visibility(
-    state: Single<&BackpackUiState, Changed<BackpackUiState>>,
+    state: Res<BackpackUiState>,
     mut backpack: Single<&mut Visibility, (With<BackpackMarker>, Without<BackpackCountText>)>,
     mut count: Single<&mut Visibility, (Without<BackpackMarker>, With<BackpackCountText>)>,
 ) {
+    if !state.is_changed() {
+        return;
+    }
+
     **backpack = if state.open {
         Visibility::Visible
     } else {
@@ -170,10 +206,14 @@ fn update_visibility(
 }
 
 fn update_count(
-    state: Single<&BackpackUiState, Changed<BackpackUiState>>,
+    state: Res<BackpackUiState>,
     text: Option<Single<Entity, With<BackpackCountText>>>,
     mut writer: TextUiWriter,
 ) {
+    if !state.is_changed() {
+        return;
+    }
+
     let Some(text) = text else {
         return;
     };
@@ -182,12 +222,16 @@ fn update_count(
 }
 
 fn update(
-    state: Single<&BackpackUiState, Changed<BackpackUiState>>,
+    state: Res<BackpackUiState>,
     heads_images: Res<HeadsImages>,
     mut head_image: Query<(&HeadImage, &mut Visibility, &mut ImageNode), Without<HeadSelector>>,
     mut head_damage: Query<(&HeadDamage, &mut Node), Without<HeadSelector>>,
     mut head_selector: Query<(&HeadSelector, &mut Visibility), Without<HeadImage>>,
 ) {
+    if !state.is_changed() {
+        return;
+    }
+
     for (HeadImage(head), mut vis, mut image) in head_image.iter_mut() {
         if let Some(head) = &state.heads[*head] {
             *vis = Visibility::Inherited;
diff --git a/crates/hedz_reloaded/src/client/ui/heads_ui.rs b/crates/hedz_reloaded/src/client/ui/heads_ui.rs
index 360ffde..78f8a1f 100644
--- a/crates/hedz_reloaded/src/client/ui/heads_ui.rs
+++ b/crates/hedz_reloaded/src/client/ui/heads_ui.rs
@@ -1,7 +1,6 @@
 use crate::{
     GameState,
-    backpack::UiHeadState,
-    heads::{ActiveHeads, HEAD_COUNT, HEAD_SLOTS},
+    heads::{ActiveHeads, HEAD_COUNT, HEAD_SLOTS, HeadState},
     heads_database::HeadsDatabase,
     loading_assets::UIAssets,
     player::LocalPlayer,
@@ -34,6 +33,43 @@ struct UiActiveHeads {
     selected_slot: usize,
 }
 
+#[derive(Clone, Copy, Debug, PartialEq, Reflect, Default, Serialize, Deserialize)]
+pub struct UiHeadState {
+    pub head: usize,
+    pub health: f32,
+    pub ammo: f32,
+    pub reloading: Option<f32>,
+}
+
+impl UiHeadState {
+    pub fn damage(&self) -> f32 {
+        1. - self.health
+    }
+
+    pub fn ammo_used(&self) -> f32 {
+        1. - self.ammo
+    }
+
+    pub fn reloading(&self) -> Option<f32> {
+        self.reloading
+    }
+
+    pub fn new(value: HeadState, time: f32) -> Self {
+        let reloading = if value.has_ammo() {
+            None
+        } else {
+            Some((time - value.last_use) / value.reload_duration)
+        };
+
+        Self {
+            head: value.head,
+            ammo: value.ammo as f32 / value.ammo_max as f32,
+            health: value.health as f32 / value.health_max as f32,
+            reloading,
+        }
+    }
+}
+
 pub fn plugin(app: &mut App) {
     app.register_type::<HeadDamage>();
     app.register_type::<UiActiveHeads>();
diff --git a/crates/hedz_reloaded/src/client/ui/mod.rs b/crates/hedz_reloaded/src/client/ui/mod.rs
index 46c11fa..54a93fb 100644
--- a/crates/hedz_reloaded/src/client/ui/mod.rs
+++ b/crates/hedz_reloaded/src/client/ui/mod.rs
@@ -2,7 +2,8 @@ mod backpack_ui;
 mod heads_ui;
 mod pause;
 
-pub use heads_ui::HeadsImages;
+pub use backpack_ui::{BACKPACK_HEAD_SLOTS, BackpackUiState};
+pub use heads_ui::{HeadsImages, UiHeadState};
 
 use bevy::prelude::*;
 
diff --git a/crates/hedz_reloaded/src/heads/mod.rs b/crates/hedz_reloaded/src/heads/mod.rs
index b85e0fd..b8196e0 100644
--- a/crates/hedz_reloaded/src/heads/mod.rs
+++ b/crates/hedz_reloaded/src/heads/mod.rs
@@ -292,12 +292,15 @@ fn on_select_active_head(
 
 fn on_swap_backpack(
     trigger: On<FromClient<BackpackSwapEvent>>,
+    clients: ClientToController,
     mut commands: Commands,
     mut query: Query<(Entity, &mut ActiveHeads, &mut Hitpoints, &mut Backpack), With<Player>>,
 ) {
+    let player = clients.get_controller(trigger.client_id);
+
     let backpack_slot = trigger.event().0;
 
-    let Ok((player, mut active_heads, mut hp, mut backpack)) = query.single_mut() else {
+    let Ok((player, mut active_heads, mut hp, mut backpack)) = query.get_mut(player) else {
         return;
     };
 
diff --git a/crates/hedz_reloaded/src/player.rs b/crates/hedz_reloaded/src/player.rs
index d3db546..be78f9e 100644
--- a/crates/hedz_reloaded/src/player.rs
+++ b/crates/hedz_reloaded/src/player.rs
@@ -1,7 +1,7 @@
 use crate::{
     GameState,
     abilities::PlayerTriggerState,
-    backpack::{Backpack, backpack_ui::BackpackUiState},
+    backpack::Backpack,
     camera::{CameraArmRotation, CameraTarget},
     cash::{Cash, CashCollectEvent, CashInventory},
     character::{AnimatedCharacter, HedzCharacter},
@@ -32,7 +32,7 @@ pub struct Player;
 
 #[derive(Component, Debug, Reflect)]
 #[reflect(Component)]
-#[require(LocalInputs, BackpackUiState)]
+#[require(LocalInputs)]
 pub struct LocalPlayer;
 
 #[derive(Component, Default, Serialize, Deserialize, PartialEq)]
@@ -95,7 +95,6 @@ pub fn spawn(
                 id,
             ),
             Backpack::default(),
-            BackpackUiState::default(),
             Inputs::default(),
             Replicated,
         ))
@@ -165,7 +164,7 @@ fn on_update_head_mesh(
     animated_characters: Query<&AnimatedCharacter>,
     mut active_head: Query<&mut ActiveHead>,
 ) -> Result {
-    let player_id = player_id.get(trigger.entity)?.clone();
+    let player_id = *(player_id.get(trigger.entity)?);
 
     let player_body_mesh = children
         .get(trigger.entity)?