diff --git a/src/main/java/com/atsuishio/superbwarfare/client/overlay/HeatBarOverlay.java b/src/main/java/com/atsuishio/superbwarfare/client/overlay/HeatBarOverlay.java
index 98ff8637d..23da796ed 100644
--- a/src/main/java/com/atsuishio/superbwarfare/client/overlay/HeatBarOverlay.java
+++ b/src/main/java/com/atsuishio/superbwarfare/client/overlay/HeatBarOverlay.java
@@ -14,6 +14,7 @@ import net.minecraft.client.gui.GuiGraphics;
 import net.minecraft.client.gui.LayeredDraw;
 import net.minecraft.client.renderer.GameRenderer;
 import net.minecraft.resources.ResourceLocation;
+import net.minecraft.util.Mth;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.ItemStack;
 import net.neoforged.api.distmarker.Dist;
@@ -68,8 +69,12 @@ public class HeatBarOverlay implements LayeredDraw.Layer {
         float rate = (float) (heat / 100.0);
         float barHeight = 56 * rate;
 
+        poseStack.pushPose();
+
         RenderHelper.preciseBlit(guiGraphics, TEXTURE, posX + 2.5f, posY + 1.5f + 56 - barHeight,
-                10.5f, 0, 2.25f, barHeight, width, height);
+                10.5f, 0, 2.25f, barHeight, width, height, rate >= 0.795f ? calculateGradientColor(rate) : 0xFFFFFF);
+
+        poseStack.popPose();
 
         RenderSystem.depthMask(true);
         RenderSystem.defaultBlendFunc();
@@ -79,4 +84,15 @@ public class HeatBarOverlay implements LayeredDraw.Layer {
 
         poseStack.popPose();
     }
+
+    public static int calculateGradientColor(float rate) {
+        float clampedRate = Mth.clamp(rate, 0.795f, 1.0f);
+        float normalized = (clampedRate - 0.795f) / (1.0f - 0.795f);
+
+        int red = 255;
+        int green = (int) (255 * (1 - normalized));
+        int blue = (int) (255 * (1 - normalized));
+
+        return (red << 16) | (green << 8) | blue;
+    }
 }
diff --git a/src/main/java/com/atsuishio/superbwarfare/item/gun/GunItem.java b/src/main/java/com/atsuishio/superbwarfare/item/gun/GunItem.java
index 737435697..4c0667797 100644
--- a/src/main/java/com/atsuishio/superbwarfare/item/gun/GunItem.java
+++ b/src/main/java/com/atsuishio/superbwarfare/item/gun/GunItem.java
@@ -81,25 +81,6 @@ public abstract class GunItem extends Item implements CustomRendererItem, GeoIte
         return this.cache;
     }
 
-    @Override
-    public boolean isBarVisible(@NotNull ItemStack stack) {
-        var data = GunData.from(stack);
-        return data.heat.get() != 0;
-    }
-
-    @Override
-    public int getBarWidth(@NotNull ItemStack stack) {
-        var data = GunData.from(stack);
-        return Math.round((float) data.heat.get() * 13.0F / 100F);
-    }
-
-    @Override
-    public int getBarColor(@NotNull ItemStack stack) {
-        var data = GunData.from(stack);
-        double f = 1 - data.heat.get() / 100.0F;
-        return Mth.hsvToRgb((float) f / 3.0F, 1.0F, 1.0F);
-    }
-
     @Override
     public boolean isPerspectiveAware() {
         return true;
diff --git a/src/main/java/com/atsuishio/superbwarfare/item/gun/shotgun/HomemadeShotgunItem.java b/src/main/java/com/atsuishio/superbwarfare/item/gun/shotgun/HomemadeShotgunItem.java
index 07d6583a4..326dfa94b 100644
--- a/src/main/java/com/atsuishio/superbwarfare/item/gun/shotgun/HomemadeShotgunItem.java
+++ b/src/main/java/com/atsuishio/superbwarfare/item/gun/shotgun/HomemadeShotgunItem.java
@@ -15,13 +15,11 @@ import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
 import net.minecraft.server.level.ServerPlayer;
 import net.minecraft.sounds.SoundEvent;
-import net.minecraft.util.Mth;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemDisplayContext;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.item.Rarity;
-import org.jetbrains.annotations.NotNull;
 import software.bernie.geckolib.animation.*;
 import software.bernie.geckolib.constant.DataTickets;
 import software.bernie.geckolib.renderer.GeoItemRenderer;
@@ -35,23 +33,6 @@ public class HomemadeShotgunItem extends GunItem {
         super(new Item.Properties().durability(24).rarity(Rarity.COMMON));
     }
 
-    @Override
-    public boolean isBarVisible(@NotNull ItemStack stack) {
-        return stack.isDamaged();
-    }
-
-    @Override
-    public int getBarWidth(@NotNull ItemStack pStack) {
-        return Math.round(13.0F - (float) pStack.getDamageValue() * 13.0F / (float) this.getMaxDamage(pStack));
-    }
-
-    @Override
-    public int getBarColor(@NotNull ItemStack pStack) {
-        float stackMaxDamage = this.getMaxDamage(pStack);
-        float f = Math.max(0.0F, (stackMaxDamage - (float) pStack.getDamageValue()) / stackMaxDamage);
-        return Mth.hsvToRgb(f / 3.0F, 1.0F, 1.0F);
-    }
-
     @Override
     public Set<SoundEvent> getReloadSound() {
         return Set.of(ModSounds.HOMEMADE_SHOTGUN_RELOAD_EMPTY.get(), ModSounds.HOMEMADE_SHOTGUN_NORMAL.get());