Fixing duplication of metal

You can take M41A from vendor, strip it for stock+underbarrel grenade launcher and get 1 metal sheel (4000) per 5 seconds. Now you are getting 200 of metal for those actions so its not effective anymore

code/modules/projectiles/gun_attachables.dm

@@ -31,7 +31,7 @@ Defined in conflicts.dm of the #defines folder.
 	var/pixel_shift_y = 16 //Uses the bottom left corner of the item.
 
 	flags_atom =  FPRINT|CONDUCT
-	matter = list("metal" = 2000)
+	matter = list("metal" = 100)
 	w_class = SIZE_SMALL
 	force = 1
 	var/slot = null //"muzzle", "rail", "under", "stock", "special"