diff --git a/code/datums/gamemodes/campaign/loadout_items/SOM/secondaries.dm b/code/datums/gamemodes/campaign/loadout_items/SOM/secondaries.dm
index d20c702f7aecc..8e06e403e7afa 100644
--- a/code/datums/gamemodes/campaign/loadout_items/SOM/secondaries.dm
+++ b/code/datums/gamemodes/campaign/loadout_items/SOM/secondaries.dm
@@ -111,7 +111,7 @@
 
 /datum/loadout_item/secondary/kit/som_engineer/sentry/post_equip(mob/living/carbon/human/wearer, datum/outfit/quick/loadout, datum/outfit_holder/holder)
 	wearer.equip_to_slot_or_del(new /obj/item/weapon/gun/energy/lasgun/lasrifle/volkite/cope, SLOT_IN_BACKPACK)
-	wearer.equip_to_slot_or_del(new /obj/item/ammo_magazine/minisentry, SLOT_IN_BACKPACK)
+	wearer.equip_to_slot_or_del(new /obj/item/explosive/grenade/som, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/combat_advanced, SLOT_IN_BACKPACK)
 
 /datum/loadout_item/secondary/kit/som_engineer/large_mines
@@ -139,7 +139,7 @@
 
 /datum/loadout_item/secondary/kit/som_corpsman/advanced
 	name = "Advanced meds"
-	desc = "A variety of advanced medical injectors including Russian Red, as well as rezadone, a powerful chemical able to treat genetic damage in humanoids."
+	desc = "A variety of advanced medical injectors including Russian Red, rezadone and Re-Grow, allowing for the treatment of cloneloss and missing limbs."
 	ui_icon = "medkit"
 	purchase_cost = 30
 
@@ -148,5 +148,6 @@
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/peridaxon_plus, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/rezadone, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/russian_red, SLOT_IN_BACKPACK)
-	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/advanced/synaptizine, SLOT_IN_BACKPACK)
+	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/regrow, SLOT_IN_BACKPACK)
+	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/synaptizine, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/antitox_mix, SLOT_IN_BACKPACK)
diff --git a/code/datums/gamemodes/campaign/loadout_items/_TGMC/secondaries.dm b/code/datums/gamemodes/campaign/loadout_items/_TGMC/secondaries.dm
index 3da0185f50fc2..6a819d730ee56 100644
--- a/code/datums/gamemodes/campaign/loadout_items/_TGMC/secondaries.dm
+++ b/code/datums/gamemodes/campaign/loadout_items/_TGMC/secondaries.dm
@@ -306,7 +306,7 @@
 
 /datum/loadout_item/secondary/kit/tgmc_corpsman/advanced
 	name = "Advanced meds"
-	desc = "A variety of advanced medical injectors including neuraline, as well as rezadone, a powerful chemical able to treat genetic damage in humanoids."
+	desc = "A variety of advanced medical injectors including neuraline, rezadone and Re-Grow, allowing for the treatment of cloneloss and missing limbs."
 	ui_icon = "medkit"
 	purchase_cost = 30
 
@@ -315,5 +315,6 @@
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/peridaxon_plus, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/rezadone, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/neuraline, SLOT_IN_BACKPACK)
-	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/advanced/synaptizine, SLOT_IN_BACKPACK)
+	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/regrow, SLOT_IN_BACKPACK)
+	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/synaptizine, SLOT_IN_BACKPACK)
 	wearer.equip_to_slot_or_del(new /obj/item/reagent_containers/hypospray/autoinjector/antitox_mix, SLOT_IN_BACKPACK)
diff --git a/code/datums/gamemodes/campaign/loadout_items/secondary_types.dm b/code/datums/gamemodes/campaign/loadout_items/secondary_types.dm
index f814d8821b919..7128dddf99622 100644
--- a/code/datums/gamemodes/campaign/loadout_items/secondary_types.dm
+++ b/code/datums/gamemodes/campaign/loadout_items/secondary_types.dm
@@ -19,6 +19,18 @@
 	name = "Extra ammo"
 	desc = "Additional ammo for your primary weapon."
 	ui_icon = "default"
+	jobs_supported = list(
+		SQUAD_MARINE,
+		SQUAD_ENGINEER,
+		SQUAD_SMARTGUNNER,
+		SQUAD_LEADER,
+		FIELD_COMMANDER,
+		SOM_SQUAD_MARINE,
+		SOM_SQUAD_ENGINEER,
+		SOM_SQUAD_VETERAN,
+		SOM_SQUAD_LEADER,
+		SOM_FIELD_COMMANDER,
+	)
 
 /datum/loadout_item/secondary/kit/primary_ammo/post_equip(mob/living/carbon/human/wearer, datum/outfit/quick/loadout, datum/outfit_holder/holder)
 	var/datum/loadout_item/suit_store/main_gun/primary = holder.equipped_things["[ITEM_SLOT_SUITSTORE]"]
@@ -30,6 +42,7 @@
 
 /datum/loadout_item/secondary/kit/primary_ammo/default
 	jobs_supported = list(SQUAD_CORPSMAN, SOM_SQUAD_CORPSMAN)
+	loadout_item_flags = LOADOUT_ITEM_ROUNDSTART_OPTION|LOADOUT_ITEM_DEFAULT_CHOICE
 
 /datum/loadout_item/secondary/kit/emp_nades
 	name = "EMP nades"
diff --git a/code/modules/reagents/chemistry/reagents/medical.dm b/code/modules/reagents/chemistry/reagents/medical.dm
index 7c0be6c25b3ea..a9f59d944cce7 100644
--- a/code/modules/reagents/chemistry/reagents/medical.dm
+++ b/code/modules/reagents/chemistry/reagents/medical.dm
@@ -1336,3 +1336,44 @@
 		if (21 to INFINITY)
 			L.jitter(5)
 	return ..()
+
+/datum/reagent/medicine/regrow
+	name = "Re-grow"
+	description = "Re-grow is rare and unusual drug that stimulates the rapid (and horrifically painful) regeneration of missing limbs."
+	color = COLOR_REAGENT_SYNAPTIZINE
+	overdose_threshold = REAGENTS_OVERDOSE/5
+	overdose_crit_threshold = REAGENTS_OVERDOSE_CRITICAL/5
+	custom_metabolism = REAGENTS_METABOLISM * 5
+
+/datum/reagent/medicine/regrow/on_mob_add(mob/living/L, metabolism)
+	if(volume < 5 || L.stat == DEAD || (!ishuman(L)))
+		return
+	var/mob/living/carbon/human/human = L
+	var/limb_regrown = FALSE
+	for(var/datum/limb/limb AS in human.limbs)
+		if(!(limb.limb_status & LIMB_DESTROYED))
+			continue
+		limb_regrown = TRUE
+		limb.biotize()
+		to_chat(human, span_userdanger("You feel unbelievable pain as your [limb.display_name] regrows before your eyes!"))
+		human.jitter(10)
+		human.Paralyze(1 SECONDS)
+		human.adjustStaminaLoss(20)
+	if(!limb_regrown)
+		return
+	human.emote("burstscream")
+	human.update_body()
+	human.updatehealth()
+	human.UpdateDamageIcon()
+
+/datum/reagent/medicine/regrow/on_mob_life(mob/living/L, metabolism)
+	L.reagent_shock_modifier -= PAIN_REDUCTION_SUPER_HEAVY
+	L.adjustToxLoss(effect_str * 2)
+	return ..()
+
+/datum/reagent/medicine/regrow/overdose_process(mob/living/L, metabolism)
+	L.apply_damage(effect_str * 4, TOX)
+
+/datum/reagent/medicine/regrow/overdose_crit_process(mob/living/L, metabolism)
+	L.reagent_shock_modifier -= PAIN_REDUCTION_SUPER_HEAVY
+	L.apply_damages(effect_str, effect_str, effect_str * 4)
diff --git a/code/modules/reagents/reagent_containers/autoinjectors.dm b/code/modules/reagents/reagent_containers/autoinjectors.dm
index e45f8b576b328..c01ed2c74e1cb 100644
--- a/code/modules/reagents/reagent_containers/autoinjectors.dm
+++ b/code/modules/reagents/reagent_containers/autoinjectors.dm
@@ -356,3 +356,13 @@
 		/datum/reagent/medicine/arithrazine = 7.5,
 	)
 	description_overlay = "Tx4"
+
+/obj/item/reagent_containers/hypospray/autoinjector/regrow
+	name = "Re-Grow autoinjector"
+	desc = "An auto-injector loaded with Re-Grow - able to rapidly regrow missing limbs."
+	icon_state = "AngelLight"
+	amount_per_transfer_from_this = 5
+	list_reagents = list(
+		/datum/reagent/medicine/regrow = 30,
+	)
+	description_overlay = "Grw"