fix prevent belt flare being filled by dump in action leaving no space for flare gun.

code/game/objects/items/storage/belt.dm

@@ -15,6 +15,34 @@
 	cant_hold = list(/obj/item/weapon/throwing_knife)
 	///TRUE Means that it closes a flap over its contents, and therefore update_icon should lift that flap when opened. If it doesn't have _half and _full iconstates, this doesn't matter either way.
 	var/flap = TRUE
+	var/holster_gun = FALSE
+
+/obj/item/storage/belt/gun/dump_into(obj/item/storage/M, mob/user)
+	for(var/slot in holster_slots)
+		if(!holster_slots[slot]["gun"]) //Open holster.
+			holster_gun = FALSE
+			break
+		if(holster_slots[slot]["gun"]) //Gun in holster.
+			holster_gun = TRUE
+			break
+
+	if(holster_gun == FALSE && contents.len >= (storage_slots-1))
+		to_chat(user, SPAN_WARNING("[src] is full."))
+		return FALSE
+	..()
+
+/obj/item/storage/belt/gun/handle_item_insertion(obj/item/W, prevent_warning = 0, mob/user)
+	for(var/slot in holster_slots)
+		if(!holster_slots[slot]["gun"]) //Open holster.
+			holster_gun = FALSE
+			break
+		if(holster_slots[slot]["gun"]) //gun in holster.
+			holster_gun = TRUE
+			break
+
+	if(W.type == /obj/item/device/flashlight/flare && holster_gun == FALSE && contents.len >= (storage_slots-1))
+		return FALSE
+	..()
 
 /obj/item/storage/belt/equipped(mob/user, slot)
 	switch(slot)
@@ -900,6 +928,7 @@
 	for(var/slot in holster_slots)
 		if(AM == holster_slots[slot]["gun"])
 			holster_slots[slot]["gun"] = null
+
 			update_gun_icon(slot)
 			return
 
@@ -1452,6 +1481,7 @@
 	name = "\improper M276 pattern M82F flare gun holster rig"
 	desc = "The M276 is the standard load-bearing equipment of the USCM. It consists of a modular belt with various clips. This version is for the M82F flare gun."
 	storage_slots = 17
+	//storage_holster = TRUE
 	max_storage_space = 20
 	icon_state = "m82f_holster"
 	item_state = "s_marinebelt"

code/game/objects/items/storage/storage.dm

@@ -31,7 +31,6 @@
 	var/storage_flags = STORAGE_FLAGS_DEFAULT
 	var/has_gamemode_skin = FALSE ///Whether to use map-variant skins.
 
-
 /obj/item/storage/MouseDrop(obj/over_object as obj)
 	if(CAN_PICKUP(usr, src))
 		if(over_object == usr) // this must come before the screen objects only block
@@ -722,6 +721,7 @@ W is always an item. stop_warning prevents messaging. user may be null.**/
 	return TRUE
 
 /obj/item/storage/proc/dump_into(obj/item/storage/M, mob/user)
+
 	if(user.action_busy)
 		return