diff --git a/src/main/java/space/yurisi/universecorev2/item/gun/RPG.java b/src/main/java/space/yurisi/universecorev2/item/gun/RPG.java
index addd691e..48e20e50 100644
--- a/src/main/java/space/yurisi/universecorev2/item/gun/RPG.java
+++ b/src/main/java/space/yurisi/universecorev2/item/gun/RPG.java
@@ -32,7 +32,7 @@ public RPG() {
         this.weight = 0.10F;
         this.fireRate = 60;
         this.recoil = 1;
-        this.spread = 5.0D;
+        this.spread = 0.5D;
         this.bulletNumber = 1;
         this.bulletSpeed = 2.0D;
         this.isJumpEnabled = false;
diff --git a/src/main/java/space/yurisi/universecorev2/subplugins/universeguns/event/GunEvent.java b/src/main/java/space/yurisi/universecorev2/subplugins/universeguns/event/GunEvent.java
index 49dc2b0b..0cf85d33 100644
--- a/src/main/java/space/yurisi/universecorev2/subplugins/universeguns/event/GunEvent.java
+++ b/src/main/java/space/yurisi/universecorev2/subplugins/universeguns/event/GunEvent.java
@@ -14,7 +14,9 @@
 import org.bukkit.event.entity.ProjectileHitEvent;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.player.*;
+import org.bukkit.inventory.EquipmentSlot;
 import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.Damageable;
 import org.bukkit.inventory.meta.ItemMeta;
 import org.bukkit.persistence.PersistentDataContainer;
 import org.bukkit.persistence.PersistentDataType;
@@ -57,6 +59,10 @@ public GunEvent(Plugin plugin) {
     public void onPlayerInteract(PlayerInteractEvent event) {
         Player player = event.getPlayer();
         Action action = event.getAction();
+        // オフハンドのイベントの場合は無視
+        if (event.getHand() != EquipmentSlot.HAND) {
+            return;
+        }
         ItemStack itemInHand = player.getInventory().getItemInMainHand();
         ItemMeta meta = itemInHand.getItemMeta();
         if (!itemInHand.hasItemMeta()) {
@@ -122,6 +128,7 @@ public void run() {
                                     if (gunStatus.getCurrentAmmo() == 0) {
                                         break;
                                     }
+
                                     new BukkitRunnable() {
                                         @Override
                                         public void run() {
@@ -161,7 +168,7 @@ public void run() {
                                         player.getWorld().playSound(player.getLocation(), Sound.BLOCK_COPPER_DOOR_CLOSE, 1.0F, 0.6F);
                                     }
                                 }
-                            }.runTaskLater(plugin, gun.getFireRate());
+                            }.runTaskLater(plugin, gun.getFireRate() - 5);
 
                         } else {
                             isShooting.put(player, false);