Zooming is now a /gun level ability, enable-able at gun creation via a "zoomable" var, Zooming can be properly enabled externally by calling the build_zooming() proc on any gun.

code/modules/projectiles/gun.dm

@@ -55,11 +55,21 @@
 	var/flight_x_offset = 0
 	var/flight_y_offset = 0
 
+	//Zooming
+	var/zoomable = FALSE //whether the gun generates a Zoom action on creation
+	var/zoomed = FALSE //Zoom toggle
+	var/zoom_amt = 3 //Distance in TURFs to move the user's screen forward (the "zoom" effect)
+	var/datum/action/toggle_scope_zoom/azoom
+
+
 /obj/item/weapon/gun/New()
 	..()
 	if(pin)
 		pin = new pin(src)
 
+	build_zooming()
+
+
 /obj/item/weapon/gun/CheckParts()
 	var/obj/item/weapon/gun/G = locate(/obj/item/weapon/gun) in contents
 	if(G)
@@ -334,13 +344,17 @@
 		if(F.on)
 			user.AddLuminosity(F.brightness_on)
 			SetLuminosity(0)
+	if(azoom)
+		azoom.Grant(user)
 
 /obj/item/weapon/gun/dropped(mob/user)
 	if(F)
 		if(F.on)
 			user.AddLuminosity(-F.brightness_on)
 			SetLuminosity(F.brightness_on)
-
+	zoom(user,FALSE)
+	if(azoom)
+		azoom.Remove(user)
 
 /obj/item/weapon/gun/attack_hand(mob/user)
 	if(unique_reskin && !reskinned && loc == user)
@@ -407,3 +421,69 @@
 		chambered.BB.damage *= 5
 
 	process_fire(target, user, 1, params)
+
+
+/////////////
+// ZOOMING //
+/////////////
+
+/datum/action/toggle_scope_zoom
+	name = "Toggle Scope"
+	check_flags = AB_CHECK_ALIVE|AB_CHECK_RESTRAINED|AB_CHECK_STUNNED|AB_CHECK_LYING
+	button_icon_state = "sniper_zoom"
+	var/obj/item/weapon/gun/gun = null
+
+/datum/action/toggle_scope_zoom/Trigger()
+	gun.zoom(owner)
+
+/datum/action/toggle_scope_zoom/IsAvailable()
+	. = ..()
+	if(!. && gun)
+		gun.zoom(owner, FALSE)
+
+/datum/action/toggle_scope_zoom/Remove(mob/living/L)
+	gun.zoom(L, FALSE)
+	..()
+
+
+
+/obj/item/weapon/gun/proc/zoom(mob/living/user, forced_zoom)
+	if(!user || !user.client)
+		return
+
+	switch(forced_zoom)
+		if(FALSE)
+			zoomed = FALSE
+		if(TRUE)
+			zoomed = TRUE
+		else
+			zoomed = !zoomed
+
+	if(zoomed)
+		var/_x = 0
+		var/_y = 0
+		switch(user.dir)
+			if(NORTH)
+				_y = zoom_amt
+			if(EAST)
+				_x = zoom_amt
+			if(SOUTH)
+				_y = -zoom_amt
+			if(WEST)
+				_x = -zoom_amt
+
+		user.client.pixel_x = world.icon_size*_x
+		user.client.pixel_y = world.icon_size*_y
+	else
+		user.client.pixel_x = 0
+		user.client.pixel_y = 0
+
+
+//Proc, so that gun accessories/scopes/etc. can easily add zooming.
+/obj/item/weapon/gun/proc/build_zooming()
+	if(azoom)
+		return
+
+	if(zoomable)
+		azoom = new()
+		azoom.gun = src

code/modules/projectiles/guns/projectile/sniper.dm

@@ -12,9 +12,9 @@
 	can_unsuppress = 1
 	can_suppress = 1
 	w_class = 3
-	var/zoomed = FALSE
-	var/zoom_amt = 7
-	var/datum/action/sniper_zoom/azoom
+	zoomable = TRUE
+	zoom_amt = 7 //Long range, enough to see in front of you, but no tiles behind you.
+
 
 /obj/item/weapon/gun/projectile/sniper_rifle/syndicate
 	name = "syndicate sniper rifle"
@@ -22,69 +22,6 @@
 	pin = /obj/item/device/firing_pin/implant/pindicate
 	origin_tech = "combat=8;syndicate=4"
 
-/obj/item/weapon/gun/projectile/sniper_rifle/New()
-	..()
-	azoom = new()
-	azoom.rifle = src
-
-/obj/item/weapon/gun/projectile/sniper_rifle/dropped(mob/living/user)
-	zoom(user,FALSE)
-	azoom.Remove(user)
-
-/obj/item/weapon/gun/projectile/sniper_rifle/pickup(mob/living/user)
-	azoom.Grant(user)
-
-/obj/item/weapon/gun/projectile/sniper_rifle/proc/zoom(mob/living/user, forced_zoom)
-	if(!user || !user.client)
-		return
-
-	switch(forced_zoom)
-		if(FALSE)
-			zoomed = FALSE
-		if(TRUE)
-			zoomed = TRUE
-		else
-			zoomed = !zoomed
-
-	if(zoomed)
-		var/_x = 0
-		var/_y = 0
-		switch(user.dir)
-			if(NORTH)
-				_y = zoom_amt
-			if(EAST)
-				_x = zoom_amt
-			if(SOUTH)
-				_y = -zoom_amt
-			if(WEST)
-				_x = -zoom_amt
-
-		user.client.pixel_x = world.icon_size*_x
-		user.client.pixel_y = world.icon_size*_y
-	else
-		user.client.pixel_x = 0
-		user.client.pixel_y = 0
-
-
-
-
-/datum/action/sniper_zoom
-	name = "Zoom Sniper Rifle"
-	check_flags = AB_CHECK_ALIVE|AB_CHECK_RESTRAINED|AB_CHECK_STUNNED|AB_CHECK_LYING
-	button_icon_state = "sniper_zoom"
-	var/obj/item/weapon/gun/projectile/sniper_rifle/rifle = null
-
-/datum/action/sniper_zoom/Trigger()
-	rifle.zoom(owner)
-
-/datum/action/sniper_zoom/IsAvailable()
-	. = ..()
-	if(!. && rifle)
-		rifle.zoom(owner, FALSE)
-
-/datum/action/sniper_zoom/Remove(mob/living/L)
-	rifle.zoom(L, FALSE)
-	..()