Macros, generic skill implementations.

code/modules/projectiles/guns/ballistic/revolver.dm

@@ -331,8 +331,7 @@
 /obj/item/gun/ballistic/revolver/doublebarrel/improvised/attackby(obj/item/A, mob/user, params)
 	..()
 	if(istype(A, /obj/item/stack/cable_coil) && !sawn_off)
-		var/obj/item/stack/cable_coil/C = A
-		if(C.use(10))
+		if(A.use_tool(src, user, 0, 10, max_level = JOB_SKILL_BASIC))
 			slot_flags = ITEM_SLOT_BACK
 			to_chat(user, "<span class='notice'>You tie the lengths of cable to the shotgun, making a sling.</span>")
 			slung = TRUE