diff --git a/code/datums/uplink_item.dm b/code/datums/uplink_item.dm
index 8a172bb85b1..3562cfd9d80 100644
--- a/code/datums/uplink_item.dm
+++ b/code/datums/uplink_item.dm
@@ -736,6 +736,14 @@ GLOBAL_LIST_INIT(uplink_items, subtypesof(/datum/uplink_item))
 	cost = 12 // normally 18
 	gamemodes = list(/datum/game_mode/nuclear)
 
+/datum/uplink_item/ammo/bulldog_XLmagsbag
+	name = "Bulldog - 12g XL Magazine Duffel Bag"
+	desc = "A duffel bag containing three 16 round drum magazines(Slug, Buckshot, Dragon's Breath)."
+	reference = "12XLDB"
+	item = /obj/item/storage/backpack/duffel/syndie/ammo/shotgunXLmags
+	cost = 12 // normally 18
+	gamemodes = list(/datum/game_mode/nuclear)
+
 /datum/uplink_item/ammo/smg
 	name = "C-20r - .45 Magazine"
 	desc = "An additional 20-round .45 magazine for use in the C-20r submachine gun. These bullets pack a lot of punch that can knock most targets down, but do limited overall damage."
diff --git a/code/game/objects/items/weapons/storage/backpack.dm b/code/game/objects/items/weapons/storage/backpack.dm
index 26045731bd9..e7880fd0868 100644
--- a/code/game/objects/items/weapons/storage/backpack.dm
+++ b/code/game/objects/items/weapons/storage/backpack.dm
@@ -372,6 +372,15 @@
 	new /obj/item/ammo_box/magazine/m12g/buckshot(src)
 	new /obj/item/ammo_box/magazine/m12g/dragon(src)
 
+/obj/item/storage/backpack/duffel/syndie/ammo/shotgunXLmags
+	desc = "A large duffelbag, containing three types of extended drum magazines."
+
+/obj/item/storage/backpack/duffel/syndie/ammo/shotgunXLmags/New()
+	..()
+	new /obj/item/ammo_box/magazine/m12g/XtrLrg(src)
+	new /obj/item/ammo_box/magazine/m12g/XtrLrg/buckshot(src)
+	new /obj/item/ammo_box/magazine/m12g/XtrLrg/dragon(src)
+
 /obj/item/storage/backpack/duffel/mining_conscript/
 	name = "mining conscription kit"
 	desc = "A kit containing everything a crewmember needs to support a shaft miner in the field."
diff --git a/code/modules/projectiles/ammunition.dm b/code/modules/projectiles/ammunition.dm
index 8536a0195e3..e6165103234 100644
--- a/code/modules/projectiles/ammunition.dm
+++ b/code/modules/projectiles/ammunition.dm
@@ -123,6 +123,7 @@
 		if(keep)
 			stored_ammo.Insert(1,b)
 		update_mat_value()
+		update_icon()
 		return b
 
 /obj/item/ammo_box/proc/give_round(obj/item/ammo_casing/R, replace_spent = 0)
diff --git a/code/modules/projectiles/ammunition/magazines.dm b/code/modules/projectiles/ammunition/magazines.dm
index c59e5890331..5cc6a19b840 100644
--- a/code/modules/projectiles/ammunition/magazines.dm
+++ b/code/modules/projectiles/ammunition/magazines.dm
@@ -383,10 +383,7 @@
 	origin_tech = "combat=3;syndicate=1"
 	caliber = "shotgun"
 	max_ammo = 8
-
-/obj/item/ammo_box/magazine/m12g/update_icon()
-	..()
-	icon_state = "[initial(icon_state)]-[CEILING(ammo_count(0)/8, 1)*8]"
+	multiple_sprites = 2
 
 /obj/item/ammo_box/magazine/m12g/buckshot
 	name = "shotgun magazine (12g buckshot slugs)"
@@ -414,6 +411,24 @@
 	icon_state = "m12gbc"
 	ammo_type = /obj/item/ammo_casing/shotgun/breaching
 
+/obj/item/ammo_box/magazine/m12g/XtrLrg
+	name = "\improper XL shotgun magazine (12g slugs)"
+	desc = "An extra large drum magazine."
+	icon_state = "m12gXlSl"
+	w_class = WEIGHT_CLASS_NORMAL
+	ammo_type = /obj/item/ammo_casing/shotgun
+	max_ammo = 16
+
+/obj/item/ammo_box/magazine/m12g/XtrLrg/buckshot
+	name = "\improper XL shotgun magazine (12g buckshot)"
+	icon_state = "m12gXlBs"
+	ammo_type = /obj/item/ammo_casing/shotgun/buckshot
+
+/obj/item/ammo_box/magazine/m12g/XtrLrg/dragon
+	name = "\improper XL shotgun magazine (12g dragon's breath)"
+	icon_state = "m12gXlDb"
+	ammo_type = /obj/item/ammo_casing/shotgun/incendiary/dragonsbreath
+
 /obj/item/ammo_box/magazine/toy
 	name = "foam force META magazine"
 	ammo_type = /obj/item/ammo_casing/caseless/foam_dart
diff --git a/code/modules/projectiles/guns/projectile/automatic.dm b/code/modules/projectiles/guns/projectile/automatic.dm
index 17a20f82d59..ea52a954a5b 100644
--- a/code/modules/projectiles/guns/projectile/automatic.dm
+++ b/code/modules/projectiles/guns/projectile/automatic.dm
@@ -275,13 +275,27 @@
 	if(magazine)
 		overlays.Cut()
 		overlays += "[magazine.icon_state]"
-		return
+		if(istype(magazine, /obj/item/ammo_box/magazine/m12g/XtrLrg))
+			w_class = WEIGHT_CLASS_BULKY
+		else
+			w_class = WEIGHT_CLASS_NORMAL
+	else
+		w_class = WEIGHT_CLASS_NORMAL
 
 /obj/item/gun/projectile/automatic/shotgun/bulldog/update_icon()
 	overlays.Cut()
 	update_magazine()
 	icon_state = "bulldog[chambered ? "" : "-e"]"
 
+/obj/item/gun/projectile/automatic/shotgun/bulldog/attackby(var/obj/item/A as obj, mob/user as mob, params)
+	if(istype(A, /obj/item/ammo_box/magazine/m12g/XtrLrg))
+		if(istype(loc, /obj/item/storage))	// To prevent inventory exploits
+			var/obj/item/storage/Strg = loc
+			if(Strg.max_w_class < WEIGHT_CLASS_BULKY)
+				to_chat(user, "<span class='warning'>You can't reload [src], with a XL mag, while it's in a normal bag.</span>")
+				return
+	return ..()
+
 /obj/item/gun/projectile/automatic/shotgun/bulldog/afterattack(atom/target as mob|obj|turf|area, mob/living/user as mob|obj, flag)
 	..()
 	empty_alarm()
diff --git a/icons/obj/ammo.dmi b/icons/obj/ammo.dmi
index 4a250a1fffc..b1876a7d063 100644
Binary files a/icons/obj/ammo.dmi and b/icons/obj/ammo.dmi differ
diff --git a/icons/obj/guns/projectile.dmi b/icons/obj/guns/projectile.dmi
index f1d09247bbd..1e61cebb799 100644
Binary files a/icons/obj/guns/projectile.dmi and b/icons/obj/guns/projectile.dmi differ