diff --git a/src/g_doom/a_doomweaps.cpp b/src/g_doom/a_doomweaps.cpp
index cce1161cf..067a106be 100644
--- a/src/g_doom/a_doomweaps.cpp
+++ b/src/g_doom/a_doomweaps.cpp
@@ -16,42 +16,11 @@
 */
 
 void P_SetSafeFlash(AWeapon *weapon, player_t *player, FState *flashstate, int index);
-static FRandom pr_fireplasma ("FirePlasma");
 static FRandom pr_firerail ("FireRail");
 static FRandom pr_bfgspray ("BFGSpray");
 static FRandom pr_oldbfg ("OldBFG");
 
 
-//
-// A_FirePlasma
-//
-DEFINE_ACTION_FUNCTION(AActor, A_FirePlasma)
-{
-	PARAM_ACTION_PROLOGUE(AActor);
-
-	player_t *player;
-
-	if (NULL == (player = self->player))
-	{
-		return 0;
-	}
-	AWeapon *weapon = self->player->ReadyWeapon;
-	if (weapon != NULL && ACTION_CALL_FROM_PSPRITE())
-	{
-		if (!weapon->DepleteAmmo (weapon->bAltFire, true, 1))
-			return 0;
-
-		FState *flash = weapon->FindState(NAME_Flash);
-		if (flash != NULL)
-		{
-			P_SetSafeFlash(weapon, player, flash, (pr_fireplasma()&1));
-		}
-	}
-
-	P_SpawnPlayerMissile (self, PClass::FindActor("PlasmaBall"));
-	return 0;
-}
-
 //
 // [RH] A_FireRailgun
 //
diff --git a/wadsrc/static/zscript.txt b/wadsrc/static/zscript.txt
index aec7e8089..192089d85 100644
--- a/wadsrc/static/zscript.txt
+++ b/wadsrc/static/zscript.txt
@@ -55,6 +55,7 @@ zscript/doom/weaponssg.txt
 zscript/doom/weaponchaingun.txt
 zscript/doom/weaponchainsaw.txt
 zscript/doom/weaponrlaunch.txt
+zscript/doom/weaponplasma.txt
 
 zscript/doom/deadthings.txt
 zscript/doom/doomammo.txt
diff --git a/wadsrc/static/zscript/doom/doomweapons.txt b/wadsrc/static/zscript/doom/doomweapons.txt
index ade261d33..7f8d7478f 100644
--- a/wadsrc/static/zscript/doom/doomweapons.txt
+++ b/wadsrc/static/zscript/doom/doomweapons.txt
@@ -13,115 +13,6 @@ class DoomWeapon : Weapon
 }
 
 
-// --------------------------------------------------------------------------
-//
-// Plasma rifle
-//
-// --------------------------------------------------------------------------
-
-class PlasmaRifle : DoomWeapon
-{
-	Default
-	{
-		Weapon.SelectionOrder 100;
-		Weapon.AmmoUse 1;
-		Weapon.AmmoGive 40;
-		Weapon.AmmoType "Cell";
-		Inventory.PickupMessage "$GOTPLASMA";
-		Tag "$TAG_PLASMARIFLE";
-	}
-	States
-	{
-	Ready:
-		PLSG A 1 A_WeaponReady;
-		Loop;
-	Deselect:
-		PLSG A 1 A_Lower;
-		Loop;
-	Select:
-		PLSG A 1 A_Raise;
-		Loop;
-	Fire:
-		PLSG A 3 A_FirePlasma;
-		PLSG B 20 A_ReFire;
-		Goto Ready;
-	Flash:
-		PLSF A 4 Bright A_Light1;
-		Goto LightDone;
-		PLSF B 4 Bright A_Light1;
-		Goto LightDone;
-	Spawn:
-		PLAS A -1;
-		Stop;
-	}
-}
-
-class PlasmaBall : Actor
-{
-	Default
-	{
-		Radius 13;
-		Height 8;
-		Speed 25;
-		Damage 5;
-		Projectile;
-		+RANDOMIZE
-		RenderStyle "Add";
-		Alpha 0.75;
-		SeeSound "weapons/plasmaf";
-		DeathSound "weapons/plasmax";
-		Obituary "$OB_MPPLASMARIFLE";
-	}
-	States
-	{
-	Spawn:
-		PLSS AB 6 Bright;
-		Loop;
-	Death:
-		PLSE ABCDE 4 Bright;
-		Stop;
-	}
-}
-
-// --------------------------------------------------------------------------
-//
-// BFG 2704
-//
-// --------------------------------------------------------------------------
-
-class PlasmaBall1 : PlasmaBall
-{
-	Default
-	{
-		Damage 4;
-		BounceType "Classic";
-		BounceFactor 1.0;
-		Obituary "$OB_MPBFG_MBF";
-	}
-	States
-	{
-	Spawn:
-		PLS1 AB 6 Bright;
-		Loop;
-	Death:
-		PLS1 CDEFG 4 Bright;
-		Stop;
-	}
-}
-	
-class PlasmaBall2 : PlasmaBall1
-{
-	States
-	{
-	Spawn:
-		PLS2 AB 6 Bright;
-		Loop;
-	Death:
-		PLS2 CDE 4 Bright;
-		Stop;
-	}
-}
-
 // --------------------------------------------------------------------------
 //
 // BFG 9000
diff --git a/wadsrc/static/zscript/doom/weaponplasma.txt b/wadsrc/static/zscript/doom/weaponplasma.txt
new file mode 100644
index 000000000..945339a35
--- /dev/null
+++ b/wadsrc/static/zscript/doom/weaponplasma.txt
@@ -0,0 +1,148 @@
+// --------------------------------------------------------------------------
+//
+// Plasma rifle
+//
+// --------------------------------------------------------------------------
+
+class PlasmaRifle : DoomWeapon
+{
+	Default
+	{
+		Weapon.SelectionOrder 100;
+		Weapon.AmmoUse 1;
+		Weapon.AmmoGive 40;
+		Weapon.AmmoType "Cell";
+		Inventory.PickupMessage "$GOTPLASMA";
+		Tag "$TAG_PLASMARIFLE";
+	}
+	States
+	{
+	Ready:
+		PLSG A 1 A_WeaponReady;
+		Loop;
+	Deselect:
+		PLSG A 1 A_Lower;
+		Loop;
+	Select:
+		PLSG A 1 A_Raise;
+		Loop;
+	Fire:
+		PLSG A 3 A_FirePlasma;
+		PLSG B 20 A_ReFire;
+		Goto Ready;
+	Flash:
+		PLSF A 4 Bright A_Light1;
+		Goto LightDone;
+		PLSF B 4 Bright A_Light1;
+		Goto LightDone;
+	Spawn:
+		PLAS A -1;
+		Stop;
+	}
+}
+
+class PlasmaBall : Actor
+{
+	Default
+	{
+		Radius 13;
+		Height 8;
+		Speed 25;
+		Damage 5;
+		Projectile;
+		+RANDOMIZE
+		RenderStyle "Add";
+		Alpha 0.75;
+		SeeSound "weapons/plasmaf";
+		DeathSound "weapons/plasmax";
+		Obituary "$OB_MPPLASMARIFLE";
+	}
+	States
+	{
+	Spawn:
+		PLSS AB 6 Bright;
+		Loop;
+	Death:
+		PLSE ABCDE 4 Bright;
+		Stop;
+	}
+}
+
+// --------------------------------------------------------------------------
+//
+// BFG 2704
+//
+// --------------------------------------------------------------------------
+
+class PlasmaBall1 : PlasmaBall
+{
+	Default
+	{
+		Damage 4;
+		BounceType "Classic";
+		BounceFactor 1.0;
+		Obituary "$OB_MPBFG_MBF";
+	}
+	States
+	{
+	Spawn:
+		PLS1 AB 6 Bright;
+		Loop;
+	Death:
+		PLS1 CDEFG 4 Bright;
+		Stop;
+	}
+}
+	
+class PlasmaBall2 : PlasmaBall1
+{
+	States
+	{
+	Spawn:
+		PLS2 AB 6 Bright;
+		Loop;
+	Death:
+		PLS2 CDE 4 Bright;
+		Stop;
+	}
+}
+
+
+//===========================================================================
+//
+// Code (must be attached to StateProvider)
+//
+//===========================================================================
+
+extend class StateProvider
+{
+
+	//===========================================================================
+	//
+	// A_FirePlasma
+	//
+	//===========================================================================
+
+	action void A_FirePlasma()
+	{
+		if (player == null)
+		{
+			return;
+		}
+		Weapon weap = player.ReadyWeapon;
+		if (weap != null && invoker == weap && stateinfo != null && stateinfo.mStateType == STATE_Psprite)
+		{
+			if (!weap.DepleteAmmo (weap.bAltFire, true, 1))
+				return;
+			
+			State flash = weap.FindState('Flash');
+			if (flash != null)
+			{
+				player.SetSafeFlash(weap, flash, random[FirePlasma]()&1);
+			}
+			
+		}
+		
+		SpawnPlayerMissile ("PlasmaBall");
+	}
+}
diff --git a/wadsrc/static/zscript/shared/inventory.txt b/wadsrc/static/zscript/shared/inventory.txt
index c1f40fd1f..270d5e6d7 100644
--- a/wadsrc/static/zscript/shared/inventory.txt
+++ b/wadsrc/static/zscript/shared/inventory.txt
@@ -51,7 +51,6 @@ class StateProvider : Inventory native
 	action native void A_Lower();
 	action native void A_Raise();
 
-	action native void A_FirePlasma();
 	action native void A_FireRailgun();
 	action native void A_FireRailgunLeft();
 	action native void A_FireRailgunRight();