diff --git a/scripts/bigshot.lic b/scripts/bigshot.lic
index fe9a7f238..01e28af3f 100644
--- a/scripts/bigshot.lic
+++ b/scripts/bigshot.lic
@@ -8,7 +8,7 @@
   contributors: SpiffyJr, Tillmen, Kalros, Hazado, Tysong, Athias, Falicor, Deysh, Nisugi
           game: Gemstone
           tags: hunting, bigshot, combat
-       version: 5.12.0
+       version: 5.12.1
       required: Lich >= 5.13.0
 
   Setup Instructions: https://gswiki.play.net/Script_Bigshot
@@ -17,6 +17,8 @@
 
   Version Control:
   Major_change.feature_addition.bugfix
+  v5.12.1  (2026-02-08)
+    - fix for cast_signs/cmd_rapid to prevent double casting due to 0sec castRT.
   v5.12.0  (2026-02-08)
     - add ES/EB/EC/ED for spell, buff, cooldown, and debuff command checks
   v5.11.4  (2026-01-14)
@@ -4939,6 +4941,7 @@ class Bigshot
     return unless Spell[515].affordable?
     return if Effects::Buffs.active?("Rapid Fire") && Effects::Buffs.time_left("Rapid Fire") > 0.05
     return if Effects::Cooldowns.active?("Rapid Fire Recovery") && ignore.to_s.empty?
+    return unless (Time.now > Spell[515].timestamp + 1.5)
 
     waitrt?
     waitcastrt?
@@ -7327,6 +7330,7 @@ class Bigshot
 
       if (!sign.active? && sign.affordable?)
         next if (Stats.prof == "Bard" && !(Char.mana >= (bard_renewal + sign.mana_cost)))
+        next unless Time.now > sign.timestamp + 1.5
         loop do
           result = sign.cast
           break if (result.to_s !~ /Spell Hindrance/ || !sign.affordable? || !(Char.mana >= (bard_renewal + sign.mana_cost)) || dead?)