diff --git a/code/modules/projectiles/ammunition.dm b/code/modules/projectiles/ammunition.dm
index dbd654d2fe5..66935652e4e 100644
--- a/code/modules/projectiles/ammunition.dm
+++ b/code/modules/projectiles/ammunition.dm
@@ -85,7 +85,7 @@
 	flags = CONDUCT
 	slot_flags = SLOT_BELT
 	item_state = "syringe_kit"
-	materials = list(MAT_METAL = 2000)
+	materials = list(MAT_METAL = 30000)
 	throwforce = 2
 	w_class = WEIGHT_CLASS_TINY
 	throw_speed = 4
@@ -96,11 +96,14 @@
 	var/multiple_sprites = 0
 	var/caliber
 	var/multiload = 1
+	var/list/initial_mats //For calculating refund values.
 
 /obj/item/ammo_box/New()
 	for(var/i in 1 to max_ammo)
 		stored_ammo += new ammo_type(src)
 	update_icon()
+	initial_mats = materials.Copy()
+	update_mat_value()
 
 /obj/item/ammo_box/Destroy()
 	QDEL_LIST(stored_ammo)
@@ -115,6 +118,7 @@
 		stored_ammo -= b
 		if(keep)
 			stored_ammo.Insert(1,b)
+		update_mat_value()
 		return b
 
 /obj/item/ammo_box/proc/give_round(obj/item/ammo_casing/R, replace_spent = 0)
@@ -125,6 +129,7 @@
 	if(stored_ammo.len < max_ammo)
 		stored_ammo += R
 		R.loc = src
+		update_mat_value()
 		return 1
 	//for accessibles magazines (e.g internal ones) when full, start replacing spent ammo
 	else if(replace_spent)
@@ -135,6 +140,7 @@
 
 				stored_ammo += R
 				R.loc = src
+				update_mat_value()
 				return 1
 
 	return 0
@@ -184,6 +190,19 @@
 			icon_state = "[initial(icon_state)]-[stored_ammo.len ? "[max_ammo]" : "0"]"
 	desc = "[initial(desc)] There are [stored_ammo.len] shell\s left!"
 
+/obj/item/ammo_box/proc/update_mat_value()
+	var/num_ammo = 0
+	for(var/B in stored_ammo)
+		var/obj/item/ammo_casing/AC = B
+		if(!AC.BB) //Skip any casing which are empty
+			continue
+		num_ammo++
+	for(var/M in initial_mats) //In case we have multiple types of materials
+		var/materials_per = initial_mats[M] / max_ammo
+		
+		var/value = max(materials_per * num_ammo, 2000) //Enforce a minimum of 2000 units even if empty.
+		materials[M] = value
+
 //Behavior for magazines
 /obj/item/ammo_box/magazine/proc/ammo_count()
 	return stored_ammo.len