diff --git a/source/server/defs/custom.qc b/source/server/defs/custom.qc
index ed2c3c9..26e4f18 100644
--- a/source/server/defs/custom.qc
+++ b/source/server/defs/custom.qc
@@ -417,9 +417,10 @@ float isPowerOn;
 
 var struct mbox_struct
 {
-	float weapon_id; 	// ID for the relevant weapon.
-	float allowed;		// 1 for allowed, 0 for denied.
-	float rarity;		// 0-100 (float) percent change for obtaining. -1 for normal.
+	float weapon_id; 			// ID for the relevant weapon.
+	float allowed;				// 1 for allowed, 0 for denied.
+	float rarity;				// 0-100 (float) percent change for obtaining. -1 for normal.
+	float already_obtained;		// true if only one allowed and a client already holds it.
 } mystery_box_weapons[MAX_BOX_WEAPONS] = {};
 
 float 	mystery_box_count;
diff --git a/source/server/entities/mystery_box.qc b/source/server/entities/mystery_box.qc
index f9f5ce3..80acf5f 100644
--- a/source/server/entities/mystery_box.qc
+++ b/source/server/entities/mystery_box.qc
@@ -135,7 +135,8 @@ float(entity user) MBOX_GetRandomBoxWeapon =
 {
     float weapon_index = rint((random() * (MAX_BOX_WEAPONS - 1)));
     float weapon_id = mystery_box_weapons[weapon_index].weapon_id;
-    float weapon_allowed = mystery_box_weapons[weapon_index].allowed;
+    float weapon_allowed = mystery_box_weapons[weapon_index].allowed && 
+							!mystery_box_weapons[weapon_index].already_obtained;
 
     if (weapon_allowed == true && !Weapon_PlayerHasWeapon(user, weapon_id, true))
         return weapon_id;
@@ -620,6 +621,22 @@ void() mystery_box_tp_spot =
 	mystery_box_count++;
 };
 
+void() MBOX_UpdatePosessionStatus =
+{
+	entity player = find(world, classname, "player");
+
+	while(player != world) {
+		for(float i = 0; i < MAX_BOX_WEAPONS; i++) {
+			float weapon_id = mystery_box_weapons[i].weapon_id;
+			mystery_box_weapons[i].already_obtained = false;
+			if (Weapon_PlayerHasWeapon(player, weapon_id, true) && WepDef_OnlyOneAllowed(weapon_id)) {
+				mystery_box_weapons[i].already_obtained = true;
+			}
+		}
+		player = find(player, classname, "player");
+	}
+}
+
 void() MBOX_Touch =
 {
 	entity tempe;
@@ -654,6 +671,7 @@ void() MBOX_Touch =
 				self.owner = other;
 				MBOX_PlayOpenAnimation();
 				Create_Floating_Weapon();
+				MBOX_UpdatePosessionStatus();
 				self.spins++;
 			}
 			else {
diff --git a/source/shared/weapon_defines.qc b/source/shared/weapon_defines.qc
index 3d58da5..64ee7dc 100644
--- a/source/shared/weapon_defines.qc
+++ b/source/shared/weapon_defines.qc
@@ -4253,6 +4253,24 @@ float(float wep) GetWeaponZoomAmount =
 	return 0;
 }
 
+//
+// WepDef_OnlyOneAllowed(weapon)
+// Returns true if server is only allowed to distribute
+// this weapon to one player at a time (e.g., from Box).
+//
+float(float weapon) WepDef_OnlyOneAllowed =
+{
+	switch(weapon) {
+		case W_TESLA:
+		case W_DG3:
+			return true;
+		default:
+			return false;
+	}
+
+	return false;
+}
+
 //
 // WepDef_GetWeaponIDFromName(weapon)
 // Takes a string input and returns the weapon ID