it compiles, that's better than it not compiling, right?

code/modules/projectiles/guns/ballistic.dm

@@ -63,7 +63,7 @@
 					playsound(src, "gun_insert_full_magazine", 70, 1)
 					if(!chambered)
 						chamber_round()
-						addtimer(CALLBACK(GLOBAL_PROC, .proc/playsound, src, 'sound/weapons/gun_chamber_round.ogg', 100, 1), 3)
+						addtimer(CALLBACK(GLOBAL_PROC_REF(playsound), src, 'sound/weapons/gun_chamber_round.ogg', 100, 1), 3)
 				else
 					playsound(src, "gun_insert_empty_magazine", 70, 1)
 				A.update_icon()

code/modules/projectiles/guns/energy/kinetic_accelerator.dm

@@ -39,7 +39,7 @@
 	if(!QDELING(src) && !holds_charge)
 		// Put it on a delay because moving item from slot to hand
 		// calls dropped().
-		addtimer(CALLBACK(src, .proc/empty_if_not_held), 1.60)
+		addtimer(CALLBACK(src,PROC_REF(empty_if_not_held)), 1.60)
 
 /obj/item/ammo_casing/energy/kinetic/premium
 	projectile_type = /obj/item/projectile/kinetic/premium
@@ -138,7 +138,7 @@
 	if(!QDELING(src) && !holds_charge)
 		// Put it on a delay because moving item from slot to hand
 		// calls dropped().
-		addtimer(CALLBACK(src, .proc/empty_if_not_held), 2)
+		addtimer(CALLBACK(src,PROC_REF(empty_if_not_held)), 2)
 
 /obj/item/gun/energy/kinetic_accelerator/proc/empty_if_not_held()
 	if(!ismob(loc))
@@ -169,7 +169,7 @@
 		carried = 1
 
 	deltimer(recharge_timerid)
-	recharge_timerid = addtimer(CALLBACK(src, .proc/reload), recharge_time * carried, TIMER_STOPPABLE)
+	recharge_timerid = addtimer(CALLBACK(src,PROC_REF(reload)), recharge_time * carried, TIMER_STOPPABLE)
 
 /obj/item/gun/energy/kinetic_accelerator/emp_act(severity)
 	return

code/modules/projectiles/guns/misc/beam_rifle.dm

@@ -268,7 +268,7 @@
 	if(istype(user))
 		current_user = user
 		LAZYOR(current_user.mousemove_intercept_objects, src)
-		RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/on_mob_move)
+		RegisterSignal(user, COMSIG_MOVABLE_MOVED,PROC_REF(on_mob_move))
 		listeningTo = user
 
 /obj/item/gun/energy/beam_rifle/onMouseDrag(src_object, over_object, src_location, over_location, params, mob)

code/modules/projectiles/guns/misc/medbeam.dm

@@ -53,7 +53,7 @@
 	current_target = target
 	active = TRUE
 	current_beam = new(user,current_target,time=6000,beam_icon_state="medbeam",btype=/obj/effect/ebeam/medical)
-	INVOKE_ASYNC(current_beam, /datum/beam.proc/Start)
+	INVOKE_ASYNC(current_beam, TYPE_PROC_REF(/datum/beam,Start))
 
 	SSblackbox.record_feedback("tally", "gun_fired", 1, type)