Tranquilizer Rifle Part 1 - Something lost, something gained. (#19781)

Removes the tranquilizer rifle from the HoS's office, and places it in
the RD's office. Along with removing the box of shells from the HoS
locker, placing them in the RD's locker.
Changes the description of the rifle to move it away from being a 50 cal
sniper. Changed the shells to reflect this as well.
Expands the RD's office and reshuffles it slightly to make space for the
tranquilizer cabinet.

Part 2 will be a resprite of the rifle, to be added at a later date.
PR will need loremaster approval due to description involving corporate
lore.

code/modules/projectiles/ammunition/bullets.dm

@@ -237,11 +237,11 @@
 	projectile_type = /obj/projectile/bullet/shotgun/moghes
 
 /obj/item/ammo_casing/tranq
-	name = "PPS shell"
-	desc = "A .50 cal PPS bullet casing."
+	name = "Plastic-Gas Shell"
+	desc = "A Plastic-Gas Shell (PGS) casing, for air powered weapons."
 	icon_state = "ishell"
 	spent_icon = "ishell-spent"
-	caliber = "PPS"
+	caliber = "PGS"
 	projectile_type = /obj/projectile/bullet/rifle/tranq
 	max_stack = 6
 

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

@@ -142,7 +142,10 @@
 
 /obj/item/gun/projectile/heavysniper/tranq
 	name = "tranquilizer rifle"
-	desc = "A less-than-lethal modification to the PTR-7 anti-materiel rifle, designed to incapacitate rioters. Fires .50 cal PPS shells that deploy a torpor-inducing drug payload."
+	desc = "A scoped tranquilizer dart gun, with a torpor educing payload."
+	desc_extended = "Designed and sold by Zeng-Hu Pharmaceuticals and produced on contract by Zavodskoi's Kumar Arms subsidiary, the rifle has quietly become ubiquitous among xenobiological researchers. \
+	While the weapon platform itself is expensive for a dart gun, users have come to adore it thanks to the benefit of its conditionally cheap ammo. Pricey off the shelf, facilities often pay a fraction \
+	of the cost thanks to rebates and bulk order discounts."
 	icon = 'icons/obj/guns/tranqsniper.dmi'
 	icon_state = "tranqsniper"
 	item_state = "tranqsniper"
@@ -150,7 +153,7 @@
 	force = 15
 	slot_flags = SLOT_BACK
 	origin_tech = list(TECH_COMBAT = 6, TECH_MATERIAL = 2)
-	caliber = "PPS"
+	caliber = "PGS"
 	recoil = 1
 	suppressed = TRUE
 	can_unsuppress = FALSE