shotgun shell clips (#11955)

* shell clips revised by based ghom

* lmao yeet better not forget that bit

* nitpicking but also merge 11976 first

* No freeloaders.

* Update weapon_designs.dm

Co-authored-by: Hatterhat <Hatterhat@users.noreply.github.com>
Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>

code/modules/projectiles/boxes_magazines/_box_magazine.dm

@@ -113,7 +113,7 @@
 
 /obj/item/ammo_box/update_icon()
 	. = ..()
-	desc = "[initial(desc)] There are [stored_ammo.len] shell\s left!"
+	desc = "[initial(desc)] There [stored_ammo.len == 1 ? "is" : "are"] [stored_ammo.len] shell\s left!"
 	for (var/material in bullet_cost)
 		var/material_amount = bullet_cost[material]
 		material_amount = (material_amount*stored_ammo.len) + base_cost[material]

code/modules/projectiles/boxes_magazines/ammo_boxes.dm

@@ -121,3 +121,51 @@
 	icon_state = "foambox_riot"
 	ammo_type = /obj/item/ammo_casing/caseless/foam_dart/riot
 	custom_materials = list(/datum/material/iron = 50000)
+
+//Shotgun clips
+/obj/item/ammo_box/shotgun
+	name = "stripper clip (shotgun shells)"
+	desc = "A stripper clip, designed to help with loading a shotgun slightly faster."
+	icon = 'icons/obj/ammo.dmi'
+	icon_state = "shotgunclip"
+	caliber = "shotgun" // slapped in to allow shell mix n match
+	ammo_type = /obj/item/ammo_casing/shotgun
+	max_ammo = 4
+	var/pixeloffsetx = 4
+	start_empty = TRUE
+
+/obj/item/ammo_box/shotgun/update_overlays()
+	. = ..()
+	if(stored_ammo.len)
+		var/offset = -4
+		for(var/A in stored_ammo)
+			var/obj/item/ammo_casing/shotgun/C = A
+			offset += pixeloffsetx
+			var/mutable_appearance/shell_overlay = mutable_appearance(icon, "[initial(C.icon_state)]-clip")
+			shell_overlay.pixel_x += offset
+			shell_overlay.appearance_flags = RESET_COLOR
+			. += shell_overlay
+
+/obj/item/ammo_box/shotgun/loaded
+	start_empty = FALSE
+
+/obj/item/ammo_box/shotgun/loaded/rubbershot
+	ammo_type = /obj/item/ammo_casing/shotgun/rubbershot
+
+/obj/item/ammo_box/shotgun/loaded/buckshot
+	ammo_type = /obj/item/ammo_casing/shotgun/buckshot
+
+/obj/item/ammo_box/shotgun/loaded/beanbag
+	ammo_type = /obj/item/ammo_casing/shotgun/beanbag
+
+/obj/item/ammo_box/shotgun/loaded/stunslug
+	ammo_type = /obj/item/ammo_casing/shotgun/stunslug
+
+/obj/item/ammo_box/shotgun/loaded/techshell
+	ammo_type = /obj/item/ammo_casing/shotgun/techshell
+
+/obj/item/ammo_box/shotgun/loaded/incendiary
+	ammo_type = /obj/item/ammo_casing/shotgun/incendiary
+
+/obj/item/ammo_box/shotgun/loaded/dart
+	ammo_type = /obj/item/ammo_casing/shotgun/dart

code/modules/research/designs/weapon_designs.dm

@@ -135,6 +135,15 @@
 //Ammo Shells/
 //////////////
 
+/datum/design/shell_clip
+	name = "stripper clip (shotgun shells)"
+	id = "sec_shellclip"
+	build_type = PROTOLATHE
+	materials = list(/datum/material/iron = 5000)
+	build_path = /obj/item/ammo_box/shotgun
+	category = list("Ammo")
+	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
+
 /datum/design/beanbag_slug/sec
 	id = "sec_beanbag"
 	build_type = PROTOLATHE
@@ -166,7 +175,7 @@
 	departmental_flags = DEPARTMENTAL_FLAG_SECURITY
 
 /datum/design/incendiary_slug/sec
-	id = "sec_Islug"
+	id = "sec_islug"
 	build_type = PROTOLATHE
 	category = list("Ammo")
 	departmental_flags = DEPARTMENTAL_FLAG_SECURITY

code/modules/research/techweb/all_nodes.dm

@@ -10,7 +10,7 @@
 	// Default research tech, prevents bricking
 	design_ids = list("basic_matter_bin", "basic_cell", "basic_scanning", "basic_capacitor", "basic_micro_laser", "micro_mani", "desttagger", "handlabel", "packagewrap",
 	"destructive_analyzer", "circuit_imprinter", "experimentor", "rdconsole", "design_disk", "tech_disk", "rdserver", "rdservercontrol", "mechfab",
-	"space_heater", "beaker", "large_beaker", "bucket", "xlarge_beaker", "sec_beanbag", "sec_rshot", "sec_bshot", "sec_slug", "sec_Islug", "sec_dart", "sec_38", "sec_38lethal",
+	"space_heater", "beaker", "large_beaker", "bucket", "xlarge_beaker", "sec_shellclip", "sec_beanbag", "sec_rshot", "sec_bshot", "sec_slug", "sec_islug", "sec_dart", "sec_38", "sec_38lethal",
 	"rglass","plasteel","plastitanium","plasmaglass","plasmareinforcedglass","titaniumglass","plastitaniumglass")
 
 /datum/techweb_node/mmi