diff --git a/language.version b/language.version
index 030b0f831..b1a198775 100644
--- a/language.version
+++ b/language.version
@@ -1,3 +1,3 @@
 [default]
-SWWM_MODVER="\cyDEMOLITIONIST \cw1.3pre r390 \cu(Wed 31 Aug 01:28:59 CEST 2022)\c-";
-SWWM_SHORTVER="\cw1.3pre r390 \cu(2022-08-31 01:28:59)\c-";
+SWWM_MODVER="\cyDEMOLITIONIST \cw1.3pre r391 \cu(Wed 31 Aug 10:07:48 CEST 2022)\c-";
+SWWM_SHORTVER="\cw1.3pre r391 \cu(2022-08-31 10:07:48)\c-";
diff --git a/zscript/dlc1/swwm_heavymahsheengun.zsc b/zscript/dlc1/swwm_heavymahsheengun.zsc
index 52844688d..ef30fb77a 100644
--- a/zscript/dlc1/swwm_heavymahsheengun.zsc
+++ b/zscript/dlc1/swwm_heavymahsheengun.zsc
@@ -9,6 +9,7 @@ Class HeavyMahSheenGun : SWWMWeapon
 	bool incooldown, stopfire, firstshot;
 	int firetimer, shotcnt;
 	int tcol;	// for random
+	bool initialized;
 
 	transient ui SmoothDynamicValueInterpolator HeatInter;
 	transient SpreadSlugTracer st;
@@ -294,6 +295,15 @@ Class HeavyMahSheenGun : SWWMWeapon
 		}
 		return Super.CheckAmmo(firemode,autoswitch,requireammo,ammocount);
 	}
+	override void AttachToOwner( Actor other )
+	{
+		if ( !initialized )
+		{
+			initialized = true;
+			firespeed = 1; // default to 700 RPM
+		}
+		Super.AttachToOwner(other);
+	}
 
 	Default
 	{