diff --git a/code/modules/projectiles/ammunition/bullets.dm b/code/modules/projectiles/ammunition/bullets.dm
index c6f1aebd2c6..2707864f19a 100644
--- a/code/modules/projectiles/ammunition/bullets.dm
+++ b/code/modules/projectiles/ammunition/bullets.dm
@@ -295,7 +295,9 @@
 	max_stack = 2
 
 /obj/item/ammo_casing/gauss/carbine
+	name = "compact tungsten slug"
 	desc = "A heavy tungsten gauss slug. This one has a casing adapated for carbine models."
+	projectile_type = /obj/item/projectile/bullet/gauss/carbine
 
 /obj/item/ammo_casing/gauss/emp
 	name = "ion slug"
diff --git a/code/modules/projectiles/projectile/bullets.dm b/code/modules/projectiles/projectile/bullets.dm
index 2aa8dd6de3d..de6eb616f1e 100644
--- a/code/modules/projectiles/projectile/bullets.dm
+++ b/code/modules/projectiles/projectile/bullets.dm
@@ -352,6 +352,10 @@
 	muzzle_type = /obj/effect/projectile/muzzle/gauss
 	embed = 0
 
+/obj/item/projectile/bullet/gauss
+	name = "compact slug"
+	damage = 20
+
 /obj/item/projectile/bullet/gauss/highex
 	name = "high-ex shell"
 	damage = 10
diff --git a/maps/sccv_horizon/placeholder-2_deck_2.dmm b/maps/sccv_horizon/placeholder-2_deck_2.dmm
index b130133d96e..9a3bb65ce67 100644
--- a/maps/sccv_horizon/placeholder-2_deck_2.dmm
+++ b/maps/sccv_horizon/placeholder-2_deck_2.dmm
@@ -673,10 +673,9 @@
 /turf/simulated/floor/grass/alt,
 /area/hydroponics/garden)
 "ati" = (
-/obj/machinery/atmospherics/portables_connector{
+/obj/machinery/atmospherics/pipe/tank/air{
 	dir = 8
 	},
-/obj/machinery/portable_atmospherics/canister/air/airlock,
 /turf/simulated/floor/plating,
 /area/engineering/engine_room)
 "atB" = (
@@ -57660,7 +57659,7 @@ qgN
 qgN
 qgN
 dpj
-dpj
+lJE
 lJE
 oSQ
 rMw
@@ -57861,7 +57860,7 @@ qgN
 qgN
 qgN
 qgN
-qgN
+dpj
 dpj
 lJE
 rMw