Departmental defense as the Found Fathers intended

code/__DEFINES/ammo.dm

@@ -27,6 +27,7 @@
 #define CALIBER_FOAM "foam_force"           // Foam darts (Toy Guns)
 #define CALIBER_GATLING "gatling"   	    // Gatling (Osprey Minigun) (Don't ask)
 #define CALIBER_SPEAR "speargun"            // Spear (Speargun)
+#define CALIBER_MUSKET "musket"				// Musket Cartridge (Maintenance Musket)
 
 /// Magic and other esoteric non-gun stuff
 #define CALIBER_ARROW "arrow"		        // Bows

code/datums/components/crafting/weapons.dm

@@ -188,6 +188,17 @@
 	time = 12
 	category = CAT_WEAPON_RANGED
 
+/datum/crafting_recipe/maint_musket
+	name = "Maintenance Musket"
+	reqs = list(/obj/item/pipe = 1,
+				/obj/item/stack/sheet/metal = 1,
+				/obj/item/weaponcrafting/stock = 1,
+				/obj/item/stack/packageWrap = 5)
+	tool_behaviors = list(TOOL_SCREWDRIVER, TOOL_WELDER, TOOL_WRENCH)
+	result = /obj/item/gun/ballistic/maint_musket
+	time = 10 SECONDS
+	category = CAT_WEAPON_RANGED
+
 /datum/crafting_recipe/sledgehammer
 	name = "Sledgehammer"
 	result = /obj/item/melee/sledgehammer
@@ -453,6 +464,24 @@
 	time = 0.5 SECONDS
 	category = CAT_WEAPON_AMMO
 
+/datum/crafting_recipe/cartridge_welder
+	name = "Cartridge Welding Fuel" //Reversed so that they're together in the menu
+	result = /obj/item/ammo_casing/caseless/cartridge
+	reqs = list(/obj/item/stack/sheet/cloth = 1,
+				/datum/reagent/fuel = 10)
+	tool_behaviors = list(TOOL_SCREWDRIVER)
+	time = 2 SECONDS
+	category = CAT_WEAPON_AMMO
+
+/datum/crafting_recipe/cartridge_BP
+	name = "Cartridge Black Powder"
+	result = /obj/item/ammo_casing/caseless/cartridge/black_powder
+	reqs = list(/obj/item/stack/sheet/cloth = 1,
+				/datum/reagent/blackpowder = 10)
+	tool_behaviors = list(TOOL_SCREWDRIVER)
+	time = 2 SECONDS
+	category = CAT_WEAPON_AMMO
+
 /datum/crafting_recipe/wood_arrow
 	name = "Wood Arrow"
 	result = /obj/item/ammo_casing/reusable/arrow/wood

code/modules/projectiles/ammunition/caseless/rocket.dm

@@ -37,3 +37,17 @@
 	projectile_type = /obj/projectile/bullet/bolt
 	firing_effect_type = /obj/effect/particle_effect/sparks/electricity
 	w_class = WEIGHT_CLASS_TINY
+
+/obj/item/ammo_casing/caseless/cartridge
+	name = "welding fuel cartridge"
+	desc = "A musket cartridge crafted by hand. This one uses welding fuel as its propellant."
+	caliber = CALIBER_MUSKET
+	icon_state = "cartridge"
+	projectile_type = /obj/projectile/bullet/cartridge
+	firing_effect_type = /obj/effect/particle_effect/fluid/smoke
+
+/obj/item/ammo_casing/caseless/cartridge/black_powder
+	name = "black powder cartridge"
+	desc = "A musket cartridge crafted by hand. This one uses black powder as its propellant."
+	icon_state = "cartridge_BP"
+	projectile_type = /obj/projectile/bullet/cartridge/black_powder

code/modules/projectiles/boxes_magazines/internal/grenade.dm

@@ -28,3 +28,8 @@
 	caliber = null
 	max_ammo = 1
 
+/obj/item/ammo_box/magazine/internal/cartridge
+	name = "cartridges"
+	ammo_type = /obj/item/ammo_casing/caseless/cartridge
+	caliber = CALIBER_MUSKET
+	max_ammo = 1

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

@@ -148,3 +148,49 @@
 	. = ..()
 	playsound(loc, "sparks", 75, 1, -1)
 	do_sparks(8, 3, usr)
+
+/obj/item/gun/ballistic/maint_musket
+	name = "maintenance musket"
+	desc = "A weapon with notoriously poor accuracy; it makes up for this by being quick and easy to smash together."
+	icon_state = "maint_musket"
+	item_state = "maint_musket"
+	mag_type = /obj/item/ammo_box/magazine/internal/cartridge
+	w_class = WEIGHT_CLASS_HUGE
+	weapon_weight = WEAPON_HEAVY
+	slot_flags = ITEM_SLOT_BACK
+	casing_ejector = FALSE
+	bolt_type = BOLT_TYPE_NO_BOLT
+	internal_magazine = TRUE
+	empty_indicator = FALSE
+	can_bayonet = TRUE
+	knife_x_offset = 27
+	knife_y_offset = 13
+	can_suppress = FALSE
+	force = 5
+	cartridge_wording = "cartridge"
+	fire_sound = 'sound/weapons/musket_shot.ogg'
+	load_sound = 'sound/weapons/musket_cock.ogg'
+	pin = /obj/item/firing_pin
+	var/reloading_active = FALSE
+
+/obj/item/gun/ballistic/maint_musket/afterattack()
+	. = ..()
+	magazine.get_round(FALSE)
+
+/obj/item/gun/ballistic/maint_musket/attackby(obj/item/A, mob/user, params)
+
+	if(istype(A, /obj/item/ammo_casing/caseless/cartridge))
+		if(reloading_active)
+			to_chat(user, span_warning("You're already reloading it!"))
+			return
+		if(magazine.stored_ammo.len > 0)
+			user.balloon_alert(user, "Already loaded!")
+			return
+		user.visible_message(span_warning("[user] starts reloading the [src]!"), span_notice("You start reloading the [src]."))
+		reloading_active = TRUE
+		if(!do_after(user, 5 SECONDS, user))
+			reloading_active = FALSE
+			user.balloon_alert(user, "You were interrupted!")
+			return
+		reloading_active = FALSE
+	return ..()

code/modules/projectiles/projectile/special/rocket.dm

@@ -93,3 +93,15 @@
 	icon_state = "bolt"
 	desc = "A smaller and faster rod."
 	damage = 25
+
+/obj/projectile/bullet/cartridge
+	name = "cartridge"
+	desc = "A small metal ball fired from a musket."
+	damage = 25
+	armour_penetration = -30 //Cheap ammo means poor AP
+	spread = 40
+
+/obj/projectile/bullet/cartridge/black_powder
+	damage = 30
+	armour_penetration = 0
+	spread = 20