diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index d0822640..d37a8141 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -20,6 +20,7 @@
 #include "ability.h"
 #include "buff.h"
 #include "collision.h"
+#include "mapinstance.h"
 
 #include "mt/Param.h"
 #include "mt/Equip.h"
@@ -930,4 +931,18 @@ const Position& Bullet::GetPos()
 void Bullet::Raycast()
 {
     raycasted_ = true;
+    glm::vec3 start = born_pos.ToGlmVec3();
+    glm::vec3 end = born_pos.AddGlmVec3(born_dir * (float)gun_meta->range()).ToGlmVec3();
+
+    bool hit_result = false;
+    glm::vec3 hit_point;
+    sender.Get()->room->map_instance->Scale(start);
+    sender.Get()->room->map_instance->Scale(end);
+    bool ret = sender.Get()->room->map_instance->Raycast(0, start, end, hit_point, hit_result);
+    if (ret) {
+        sender.Get()->room->map_instance->UnScale(hit_point);
+        raycast_len_ = GlmHelper::Norm(hit_point - born_pos.ToGlmVec3());
+    } else {
+        raycast_len_ = 0.0f;
+    }
 }