diff --git a/code/modules/halo/weapons/ammo_7-62mm.dm b/code/modules/halo/weapons/ammo_7-62mm.dm
index 179afef8f0809..02727dc90c072 100644
--- a/code/modules/halo/weapons/ammo_7-62mm.dm
+++ b/code/modules/halo/weapons/ammo_7-62mm.dm
@@ -45,7 +45,7 @@
 	alpha = 160
 
 /obj/item/ammo_casing/m120
-	desc = "A 7.62mm HP bullet casing."
+	desc = "A 7.62mm +P bullet casing."
 	caliber = "7.62mmdmr"
 	projectile_type = /obj/item/projectile/bullet/m120
 
@@ -53,7 +53,8 @@
 	damage = 35
 	armor_penetration = 40
 	penetrating = 1
+	pen_limited = 1
 	shield_damage = 15
 	tracer_type = /obj/effect/projectile/dmr_trail
 	tracer_delay_time = 0.5 SECONDS
-	steps_between_delays = 3
+	steps_between_delays = 5
diff --git a/code/modules/halo/weapons/covenant/ammo.dm b/code/modules/halo/weapons/covenant/ammo.dm
index ed80c435faf4e..f9a3a3301a964 100644
--- a/code/modules/halo/weapons/covenant/ammo.dm
+++ b/code/modules/halo/weapons/covenant/ammo.dm
@@ -296,8 +296,10 @@
 	tracer_delay_time = 0.5 SECONDS
 	invisibility = 101
 	max_track_steps = 1
+	penetrating = 1
+	pen_limited = 1
 	muzzle_type = /obj/effect/projectile/muzzle/cov_red
-	steps_between_delays = 3
+	steps_between_delays = 5
 
 /obj/effect/projectile/bullet/covenant/needles
 	icon = 'code/modules/halo/weapons/icons/Covenant_Projectiles.dmi'
diff --git a/code/modules/halo/weapons/forerunner/ammo.dm b/code/modules/halo/weapons/forerunner/ammo.dm
index 065c1496270f9..e7655b37dec82 100644
--- a/code/modules/halo/weapons/forerunner/ammo.dm
+++ b/code/modules/halo/weapons/forerunner/ammo.dm
@@ -41,6 +41,7 @@
 	damage = 25
 	armor_penetration = 15
 	penetrating = 1
+	pen_limited = 1
 
 /obj/item/projectile/bullet/pellet/shotgun/boltshot
 	name = "hardlight shrapnel"
@@ -48,6 +49,7 @@
 	icon_state = "boltshot_ammo"
 	fire_sound = 'code/modules/halo/sounds/boltshot_sg_fire.ogg'
 	penetrating = 1
+	pen_limited = 1
 
 /obj/item/ammo_magazine/binaryrifle
 	name = "Z-750 SASR magazine"
@@ -108,4 +110,5 @@
 	damage = 20
 	armor_penetration = 20
 	penetrating = 1
+	pen_limited = 1
 	shield_damage = 5
diff --git a/code/modules/projectiles/projectile.dm b/code/modules/projectiles/projectile.dm
index c506461329e7f..6d031a1fab40c 100644
--- a/code/modules/projectiles/projectile.dm
+++ b/code/modules/projectiles/projectile.dm
@@ -34,6 +34,7 @@
 	var/check_armour = "bullet" //Defines what armor to use when it hits things.  Must be set to bullet, laser, energy,or bomb	//Cael - bio and rad are also valid
 	var/projectile_type = /obj/item/projectile
 	var/penetrating = 0 //If greater than zero, the projectile will pass through dense objects as specified by on_penetrate(). If 999, always penetrates.
+	var/pen_limited = 0 //Only penetrate non-wall objects.
 	var/shield_damage = 0 //Damage applied soley to shields. If this damage alone breaks a shield, the projectile will not encounter the usual shield gating.
 	var/kill_count = 50 //This will de-increment every process(). When 0, it will delete the projectile.
 		//Effects
diff --git a/code/modules/projectiles/projectile/bullets.dm b/code/modules/projectiles/projectile/bullets.dm
index 4d0a0fa66ad61..d09b27fe41c8a 100644
--- a/code/modules/projectiles/projectile/bullets.dm
+++ b/code/modules/projectiles/projectile/bullets.dm
@@ -44,7 +44,7 @@
 			return 0
 		return 1
 
-	if(penetrating > 0)
+	if(penetrating > 0 && (pen_limited == 0 || (pen_limited == 1 && !isturf(A))))
 		if(A.opacity)
 			//display a message so that people on the other side aren't so confused
 			A.visible_message("<span class='warning'>\The [src] pierces through \the [A]!</span>")