Polychromic element.

code/game/objects/items.dm

@@ -425,6 +425,13 @@ GLOBAL_VAR_INIT(rpg_loot_items, FALSE)
 	item_flags |= IN_INVENTORY
 	user.update_equipment_speed_mods()
 
+//Overlays for the worn overlay so you can overlay while you overlay
+//eg: ammo counters, primed grenade flashing, etc.
+//"icon_file" is used automatically for inhands etc. to make sure it gets the right inhand file
+/obj/item/proc/worn_overlays(isinhands = FALSE, icon_file, style_flags = NONE)
+	. = list()
+	SEND_SIGNAL(src, COMSIG_ITEM_WORN_OVERLAYS, isinhands, icon_file, style_flags, .)
+
 //sometimes we only want to grant the item's action if it's equipped in a specific slot.
 /obj/item/proc/item_action_slot_check(slot, mob/user, datum/action/A)
 	if(slot == SLOT_IN_BACKPACK || slot == SLOT_LEGCUFFED) //these aren't true slots, so avoid granting actions there