Adds a CL-exclusive pistol, the ES-4. (#3583)

# About the pull request
This PR adds a CL- and therefore WY - exclusive pistol. The ES-4 is a
Weyland Corp manufactures less-lethal pistol that's essentially a reskin
of the 88 mod 4 that only fires less-lethal projectiles. Sprites by the
fantastic @thwompa
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# Explain why it's good for the game
The pistol uses distinct blue muzzle flashes for its firing so that it's
easier to distinguish it from normal guns, and it comes straight from
the Aliens RPG. It also looks cool and makes it harder for the CL to get
a lethal firearm straight off the bat.
# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
add: Added the ES-4 electrostatic pistol to the CL's safe.
/:cl:

---------

Co-authored-by: Drathek <[email protected]>

code/modules/projectiles/ammo_datums.dm

@@ -377,6 +377,11 @@
 	stamina_damage = 25
 	shrapnel_chance = 0
 
+// Reskinned rubber bullet used for the ES-4 CL pistol.
+/datum/ammo/bullet/pistol/rubber/stun
+	name = "stun pistol bullet"
+	sound_override = null
+
 // Used by M1911, Deagle and KT-42
 /datum/ammo/bullet/pistol/heavy
 	name = "heavy pistol bullet"

code/modules/projectiles/guns/pistols.dm

@@ -573,6 +573,43 @@
 	flashlight.Attach(src)
 	update_attachable(flashlight.slot)
 
+//-------------------------------------------------------
+// ES-4 - Basically a CL-exclusive reskin of the 88 mod 4 that only uses less-lethal ammo.
+
+/obj/item/weapon/gun/pistol/es4
+	name = "\improper ES-4 electrostatic pistol"
+	desc = "A Weyland Corp manufactured less-than-lethal pistol. Originally manufactured in the 2080s, the ES-4 electrostatic pistol fires electrically-charged bullets with high accuracy, though its cost and constant need for cleaning makes it a rare sight."
+	icon = 'icons/obj/items/weapons/guns/guns_by_faction/wy.dmi'
+	icon_state = "es4"
+	item_state = "es4"
+	fire_sound = 'sound/weapons/gun_es4.ogg'
+	firesound_volume = 20
+	reload_sound = 'sound/weapons/gun_88m4_reload.ogg'
+	unload_sound = 'sound/weapons/gun_88m4_unload.ogg'
+	current_mag = /obj/item/ammo_magazine/pistol/es4
+	force = 8
+	muzzle_flash = "muzzle_flash_blue"
+	flags_gun_features = GUN_AUTO_EJECTOR|GUN_CAN_POINTBLANK|GUN_ONE_HAND_WIELDED|GUN_AMMO_COUNTER
+	attachable_allowed = list(
+		/obj/item/attachable/flashlight,
+		/obj/item/attachable/reflex,
+		/obj/item/attachable/reddot,
+		/obj/item/attachable/lasersight,
+	)
+
+/obj/item/weapon/gun/pistol/es4/set_gun_attachment_offsets()
+	attachable_offset = list("muzzle_x" = 27, "muzzle_y" = 21, "rail_x" = 10, "rail_y" = 22, "under_x" = 25, "under_y" = 18, "stock_x" = 18, "stock_y" = 15)
+
+
+/obj/item/weapon/gun/pistol/es4/set_gun_config_values()
+	..()
+	fire_delay = FIRE_DELAY_TIER_9
+	accuracy_mult = BASE_ACCURACY_MULT
+	accuracy_mult_unwielded = BASE_ACCURACY_MULT
+	scatter = SCATTER_AMOUNT_TIER_7
+	scatter_unwielded = SCATTER_AMOUNT_TIER_7
+	damage_mult = BASE_BULLET_DAMAGE_MULT + BULLET_DAMAGE_MULT_TIER_4
+
 //-------------------------------------------------------
 //VP78 - the only pistol viable as a primary.
 

code/modules/projectiles/magazines/pistols.dm

@@ -105,6 +105,19 @@
 	default_ammo = /datum/ammo/bullet/pistol/rubber
 	ammo_band_color = AMMO_BAND_COLOR_RUBBER
 
+//-------------------------------------------------------
+//ES-4
+
+/obj/item/ammo_magazine/pistol/es4
+	name = "\improper ES-4 stun magazine (9mm)"
+	default_ammo = /datum/ammo/bullet/pistol/rubber/stun
+	caliber = "9mm"
+	desc = "Holds 19 rounds of specialized Conductive 9mm. Electrostatic propulsion in the ES-4 functions by propelling an cV9mm round, at a proportionally slower velocity to maintain a higher kinetic energy transfer rate. All this turns a penetrative round into a less-than-lethal round."
+	icon = 'icons/obj/items/weapons/guns/ammo_by_faction/wy.dmi'
+	icon_state = "es4"
+	max_rounds = 19
+	gun_type = /obj/item/weapon/gun/pistol/es4
+
 //-------------------------------------------------------
 //VP78
 

maps/map_files/USS_Almayer/USS_Almayer.dmm

@@ -15802,13 +15802,12 @@
 "bhM" = (
 /obj/structure/safe,
 /obj/item/coin/platinum,
-/obj/item/attachable/suppressor,
 /obj/item/spacecash/c1000/counterfeit,
 /obj/item/spacecash/c1000/counterfeit,
 /obj/item/clothing/accessory/storage/holster,
-/obj/item/weapon/gun/pistol/mod88,
-/obj/item/ammo_magazine/pistol/mod88/rubber,
-/obj/item/ammo_magazine/pistol/mod88/rubber,
+/obj/item/weapon/gun/pistol/es4,
+/obj/item/ammo_magazine/pistol/es4,
+/obj/item/ammo_magazine/pistol/es4,
 /obj/item/clothing/suit/armor/bulletproof,
 /turf/open/floor/wood/ship,
 /area/almayer/command/corporateliason)