Adds Cryostatis Shotgun Darts (#35342)

* adds cryostatis shotgun darts, because shooting tiny water+potassium bombs into people is funny

* lowers amount from 15 to 10

* Update ammo_casings.dm

code/modules/projectiles/ammunition/ammo_casings.dm

@@ -283,12 +283,21 @@
 	desc = "A dart for use in shotguns. Can be injected with up to 30 units of any chemical."
 	icon_state = "cshell"
 	projectile_type = /obj/item/projectile/bullet/dart
+	var/reagent_amount = 30
+	var/reagent_react = TRUE
+
+/obj/item/ammo_casing/shotgun/dart/noreact
+	name = "cryostasis shotgun dart"
+	desc = "A dart for use in shotguns, using similar technolgoy as cryostatis beakers to keep internal reagents from reacting. Can be injected with up to 10 units of any chemical."
+	icon_state = "cnrshell"
+	reagent_amount = 10
+	reagent_react = FALSE
 
 /obj/item/ammo_casing/shotgun/dart/Initialize()
 	. = ..()
 	container_type |= OPENCONTAINER
-	create_reagents(30)
+	create_reagents(reagent_amount)
-	reagents.set_reacting(TRUE)
+	reagents.set_reacting(reagent_react)
 
 /obj/item/ammo_casing/shotgun/dart/attackby()
 	return

code/modules/research/designs/weapon_designs.dm

@@ -251,3 +251,13 @@
 	build_path = /obj/item/gun/energy/kinetic_accelerator/crossbow/large
 	category = list("Weapons")
 	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
+/datum/design/cryostatis_shotgun_dart
+	name = "Cryostatis Shotgun Dart"
+	desc = "A shotgun dart designed with similar internals to that of a cryostatis beaker, allowing reagents to not react when inside."
+	id = "shotgundartcryostatis"
+	build_type = PROTOLATHE
+	materials = list(MAT_METAL = 3500)
+	build_path = /obj/item/ammo_casing/shotgun/dart/noreact
+	category = list("Ammo")
+	departmental_flags = DEPARTMENTAL_FLAG_MEDICAL

code/modules/research/techweb/all_nodes.dm

@@ -514,7 +514,7 @@
 	display_name = "Medical Weaponry"
 	description = "Weapons using medical technology."
 	prereq_ids = list("adv_biotech", "adv_weaponry")
-	design_ids = list("rapidsyringe")
+	design_ids = list("rapidsyringe", "shotgundartcryostatis")
 	research_cost = 2500
 	export_price = 5000