Index: code/ai/aiturret.cpp
===================================================================
--- code/ai/aiturret.cpp	(revision 9437)
+++ code/ai/aiturret.cpp	(working copy)
@@ -1808,7 +1808,7 @@
 				// so we need to get the position info separately for each shot
 				ship_get_global_turret_gun_info(&Objects[parent_objnum], turret, turret_pos, turret_fvec, 1, NULL);
 
-				weapon_objnum = weapon_create( turret_pos, &turret_orient, turret_weapon_class, parent_objnum, -1, 1);
+				weapon_objnum = weapon_create( turret_pos, &turret_orient, turret_weapon_class, parent_objnum, -1, 1, 0,0.0f, turret);
 				weapon_set_tracking_info(weapon_objnum, parent_objnum, turret->turret_enemy_objnum, 1, turret->targeted_subsys);		
 			
 
@@ -1927,7 +1927,7 @@
 	vm_vector_2_matrix(&turret_orient, &turret_fvec, NULL, NULL);
 
 	// create weapon and homing info
-	weapon_objnum = weapon_create(&turret_pos, &turret_orient, tsi->weapon_class, tsi->parent_objnum, -1, 1);
+	weapon_objnum = weapon_create(&turret_pos, &turret_orient, tsi->weapon_class, tsi->parent_objnum, -1, 1, 0, 0.0f, tsi->turret);
 	weapon_set_tracking_info(weapon_objnum, tsi->parent_objnum, tsi->target_objnum, 1, tsi->target_subsys);
 
 	// do other cool stuff if weapon is created.
Index: code/network/multimsgs.cpp
===================================================================
--- code/network/multimsgs.cpp	(revision 9437)
+++ code/network/multimsgs.cpp	(working copy)
@@ -3327,7 +3327,7 @@
 		multi_set_network_signature( wnet_signature, MULTI_SIG_NON_PERMANENT );
 	}
 
-	weapon_objnum = weapon_create( &pos, &orient, wid, OBJ_INDEX(objp), -1, 1);
+	weapon_objnum = weapon_create( &pos, &orient, wid, OBJ_INDEX(objp), -1, 1, 0, 0.0f, ssp);
 	if (weapon_objnum != -1) {
 		if ( Weapon_info[wid].launch_snd != -1 ) {
 			snd_play_3d( &Snds[Weapon_info[wid].launch_snd], &pos, &View_position );
@@ -8383,7 +8383,7 @@
 	ship_get_global_turret_info(objp, ssp->system_info, &pos, &dir);
 
 	// create the weapon object	
-	weapon_objnum = weapon_create( &pos, &orient, wid, OBJ_INDEX(objp), -1, 1);
+	weapon_objnum = weapon_create( &pos, &orient, wid, OBJ_INDEX(objp), -1, 1, 0, 0.0f, ssp);
 	if (weapon_objnum != -1) {
 		if ( Weapon_info[wid].launch_snd != -1 ) {
 			snd_play_3d( &Snds[Weapon_info[wid].launch_snd], &pos, &View_position );
Index: code/weapon/weapon.h
===================================================================
--- code/weapon/weapon.h	(revision 9437)
+++ code/weapon/weapon.h	(working copy)
@@ -611,7 +611,7 @@
 
 // Passing a group_id of -1 means it isn't in a group.  See weapon_create_group_id for more 
 // help on weapon groups.
-int weapon_create( vec3d * pos, matrix * orient, int weapon_type, int parent_obj, int group_id=-1, int is_locked = 0, int is_spawned = 0, float fof_cooldown = 0.0f);
+int weapon_create( vec3d * pos, matrix * orient, int weapon_type, int parent_obj, int group_id=-1, int is_locked = 0, int is_spawned = 0, float fof_cooldown = 0.0f, ship_subsys * src_turret = NULL);
 void weapon_set_tracking_info(int weapon_objnum, int parent_objnum, int target_objnum, int target_is_locked = 0, ship_subsys *target_subsys = NULL);
 
 // for weapons flagged as particle spewers, spew particles. wheee
Index: code/weapon/weapons.cpp
===================================================================
--- code/weapon/weapons.cpp	(revision 9437)
+++ code/weapon/weapons.cpp	(working copy)
@@ -4870,9 +4870,13 @@
 	}
 }
 
-inline size_t* get_pointer_to_weapon_fire_pattern_index(int weapon_type, ship* shipp) {
+inline size_t* get_pointer_to_weapon_fire_pattern_index(int weapon_type, ship* shipp, ship_subsys * src_turret) {
 	Assert( shipp != NULL );
 	ship_weapon* ship_weapon_p = &(shipp->weapons);
+	if(src_turret)
+	{
+		ship_weapon_p = &src_turret->weapons;
+	}
 	Assert( ship_weapon_p != NULL );
 
 	// search for the corresponding bank pattern index for the weapon_type that is being fired.
@@ -4897,7 +4901,7 @@
  * @return Index of weapon in the Objects[] array, -1 if the weapon object was not created
  */
 int Weapons_created = 0;
-int weapon_create( vec3d * pos, matrix * porient, int weapon_type, int parent_objnum, int group_id, int is_locked, int is_spawned, float fof_cooldown)
+int weapon_create( vec3d * pos, matrix * porient, int weapon_type, int parent_objnum, int group_id, int is_locked, int is_spawned, float fof_cooldown, ship_subsys * src_turret)
 {
 	int			n, objnum;
 	int num_deleted;
@@ -4931,7 +4935,7 @@
 		ship* parent_shipp = &(Ships[parent_objp->instance]);
 		Assert( parent_shipp != NULL );
 
-		size_t *position = get_pointer_to_weapon_fire_pattern_index(weapon_type, parent_shipp);
+		size_t *position = get_pointer_to_weapon_fire_pattern_index(weapon_type, parent_shipp, src_turret);
 		Assertion( position != NULL, "'%s' is trying to fire a weapon that is not selected", Ships[parent_objp->instance].ship_name );
 
 		*position = ++(*position) % wip->weapon_substitution_pattern.size();