diff --git a/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java b/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java
index 9188ea4dd..f80363046 100644
--- a/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java
+++ b/src/main/java/com/atsuishio/superbwarfare/event/ClientEventHandler.java
@@ -1499,7 +1499,9 @@ public class ClientEventHandler {
                             Vec3 playerVec = new Vec3(Mth.lerp(event.getPartialTick(), player.xo - 0.1 * player.getViewVector(1).x, player.getX() - 0.1 * player.getViewVector(1).x),
                                     Mth.lerp(event.getPartialTick(), player.yo + player.getEyeHeight() - 0.1 * player.getViewVector(1).y, player.getEyeY() - 0.1 * player.getViewVector(1).y),
                                     Mth.lerp(event.getPartialTick(), player.zo - 0.1 * player.getViewVector(1).z, player.getZ() - 0.1 * player.getViewVector(1).z));
-                            Vec3 toVec = RangeTool.calculateFiringSolution(playerVec, targetVec, entity.getDeltaMovement(), data.velocity(), 0.03);
+
+                            var hasGravity = data.perk.getLevel(ModPerks.MICRO_MISSILE) <= 0;
+                            Vec3 toVec = RangeTool.calculateFiringSolution(playerVec, targetVec, entity.getDeltaMovement(), data.velocity(), hasGravity ? 0.03 : 0);
                             look(player, toVec);
                         }
                     }
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 02aef54cf..737435697 100644
--- a/src/main/java/com/atsuishio/superbwarfare/item/gun/GunItem.java
+++ b/src/main/java/com/atsuishio/superbwarfare/item/gun/GunItem.java
@@ -691,11 +691,13 @@ public abstract class GunItem extends Item implements CustomRendererItem, GeoIte
 
         if (zoom && !player.isShiftKeyDown()) {
             Entity target = findEntity(player.level(), String.valueOf(uuid));
-            int intelligentChipLevel = GunData.from(stack).perk.getLevel(ModPerks.INTELLIGENT_CHIP);
+            var gunData = GunData.from(stack);
+            int intelligentChipLevel = gunData.perk.getLevel(ModPerks.INTELLIGENT_CHIP);
             if (intelligentChipLevel > 0 && target != null) {
                 Vec3 targetVec = target.getEyePosition();
                 Vec3 playerVec = player.getEyePosition();
-                Vec3 toVec = RangeTool.calculateFiringSolution(playerVec, targetVec, Vec3.ZERO, data.velocity(), 0.03);
+                var hasGravity = gunData.perk.getLevel(ModPerks.MICRO_MISSILE) <= 0;
+                Vec3 toVec = RangeTool.calculateFiringSolution(playerVec, targetVec, Vec3.ZERO, data.velocity(), hasGravity ? 0.03 : 0);
                 x = toVec.x;
                 y = toVec.y;
                 z = toVec.z;
diff --git a/src/main/java/com/atsuishio/superbwarfare/item/gun/launcher/SecondaryCataclysm.java b/src/main/java/com/atsuishio/superbwarfare/item/gun/launcher/SecondaryCataclysm.java
index 2cdcb3453..baae0c941 100644
--- a/src/main/java/com/atsuishio/superbwarfare/item/gun/launcher/SecondaryCataclysm.java
+++ b/src/main/java/com/atsuishio/superbwarfare/item/gun/launcher/SecondaryCataclysm.java
@@ -254,11 +254,13 @@ public class SecondaryCataclysm extends GunItem implements EnergyStorageItem {
 
             if (zoom && !player.isShiftKeyDown()) {
                 Entity target = findEntity(player.level(), String.valueOf(uuid));
-                int intelligentChipLevel = GunData.from(stack).perk.getLevel(ModPerks.INTELLIGENT_CHIP);
+                var gunData = GunData.from(stack);
+                int intelligentChipLevel = gunData.perk.getLevel(ModPerks.INTELLIGENT_CHIP);
                 if (intelligentChipLevel > 0 && target != null) {
                     Vec3 targetVec = target.getEyePosition();
                     Vec3 playerVec = player.getEyePosition();
-                    Vec3 toVec = RangeTool.calculateFiringSolution(playerVec, targetVec, Vec3.ZERO, (isChargedFire ? 4 : 1) * velocity, 0.05);
+                    var hasGravity = gunData.perk.getLevel(ModPerks.MICRO_MISSILE) <= 0;
+                    Vec3 toVec = RangeTool.calculateFiringSolution(playerVec, targetVec, Vec3.ZERO, (isChargedFire ? 4 : 1) * velocity, hasGravity ? 0.05 : 0);
                     x = toVec.x;
                     y = toVec.y;
                     z = toVec.z;
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 0e2b853d6..07d6583a4 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
@@ -41,7 +41,7 @@ public class HomemadeShotgunItem extends GunItem {
     }
 
     @Override
-    public int getBarWidth(ItemStack pStack) {
+    public int getBarWidth(@NotNull ItemStack pStack) {
         return Math.round(13.0F - (float) pStack.getDamageValue() * 13.0F / (float) this.getMaxDamage(pStack));
     }