Various gun gunfixes (#2599)

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## About The Pull Request

Various bugfixes related to guns. Fixes #603? maybe?

## Why It's Good For The Game

Less bugs are great for the game. Trust me

## Changelog

:cl: FleetingExpertise
fix: The 'phantom round' bug with guns has been fixed
fix: Ghosts can no longer toggle gun safety
fix: Bulldogs no longer destroy shotgun shells from existence
fix: Bows should no longer randomly break
fix: A lot of jank involving the E-40 has been fixed

/:cl:

code/modules/projectiles/gun.dm

@@ -526,17 +526,22 @@
 	if(!has_safety)
 		return
 
-	if(src == !user.get_active_held_item())
+	if(src != user.get_active_held_item())
 		return
 
-	playsound(user, 'sound/weapons/gun/general/selector.ogg', 100, TRUE)
+	if(isliving(user) && in_range(src, user))
+		toggle_safety(user)
+
+/obj/item/gun/proc/toggle_safety(mob/user, silent=FALSE)
 	safety = !safety
 
-	user.visible_message(
-		span_notice("[user] turns the safety on [src] [safety ? "<span class='green'>ON</span>" : "<span class='red'>OFF</span>"]."),
-		span_notice("You turn the safety on [src] [safety ? "<span class='green'>ON</span>" : "<span class='red'>OFF</span>"]."),
-		vision_distance = COMBAT_MESSAGE_RANGE
-	)
+	if(!silent)
+		playsound(user, 'sound/weapons/gun/general/selector.ogg', 100, TRUE)
+		user.visible_message(
+			span_notice("[user] turns the safety on [src] [safety ? "<span class='green'>ON</span>" : "<span class='red'>OFF</span>"]."),
+			span_notice("You turn the safety on [src] [safety ? "<span class='green'>ON</span>" : "<span class='red'>OFF</span>"]."),
+		)
+
 	update_appearance()
 
 

code/modules/projectiles/guns/ballistic.dm

@@ -101,7 +101,7 @@
 		return
 	if (!magazine)
 		magazine = new mag_type(src)
-	chamber_round(TRUE)
+	chamber_round()
 	update_appearance()
 
 /obj/item/gun/ballistic/update_icon_state()

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

@@ -255,9 +255,10 @@
 		return ..()
 
 /obj/item/gun/ballistic/automatic/assault/e40/attackby(obj/item/attack_obj, mob/user, params)
-	if(istype(attack_obj, /obj/item/stock_parts/cell/gun) || istype(attack_obj, /obj/item/screwdriver))
-		secondary.attack_self()
+	if(istype(attack_obj, /obj/item/stock_parts/cell/gun))
 		secondary.attackby(attack_obj, user, params)
+	if(istype(attack_obj, /obj/item/screwdriver))
+		secondary.screwdriver_act(user, attack_obj,)
 	else
 		..()
 
@@ -303,6 +304,12 @@
 	update_icon()
 	return
 
+
+
+/obj/item/gun/ballistic/automatic/assault/e40/toggle_safety(mob/user, silent=FALSE)
+	. = ..()
+	secondary.toggle_safety(user, silent=TRUE)
+
 //laser
 
 /obj/item/gun/energy/laser/e40_laser_secondary

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

@@ -176,6 +176,7 @@
 	special_mags = TRUE
 	semi_auto = TRUE
 	internal_magazine = FALSE
+	casing_ejector = TRUE
 	tac_reloads = TRUE
 	pickup_sound =  'sound/items/handling/rifle_pickup.ogg'
 	manufacturer = MANUFACTURER_SCARBOROUGH