diff --git a/mods/ENTITIES/mcl_mobs/api/api.lua b/mods/ENTITIES/mcl_mobs/api/api.lua
index c7d92c1e6..b1ea2d1e9 100644
--- a/mods/ENTITIES/mcl_mobs/api/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api/api.lua
@@ -328,8 +328,13 @@ function mobs:register_mob(name, def)
 		attacking = nil,
 		visual_size_origin = def.visual_size or {x = 1, y = 1, z = 1},
 		punch_timer_cooloff = def.punch_timer_cooloff or 0.5,
-		projectile_cooldown = def.projectile_cooldown or 2,
 		death_animation_timer = 0,
+		hostile_cooldown = def.hostile_cooldown or 15,
+		tilt_fly = def.tilt_fly,
+		tilt_swim = def.tilt_swim,
+		fall_slow = def.fall_slow,
+		projectile_cooldown_min = def.projectile_cooldown_min or 2,
+		projectile_cooldown_max = def.projectile_cooldown_max or 6,
 		--end j4i stuff
 
 		-- MCL2 extensions
@@ -353,10 +358,6 @@ function mobs:register_mob(name, def)
 		ignited_by_sunlight = def.ignited_by_sunlight or false,
 		eye_height = def.eye_height or 1.5,
 		defuse_reach = def.defuse_reach or 4,
-		hostile_cooldown = def.hostile_cooldown or 15,
-		tilt_fly = def.tilt_fly,
-		tilt_swim = def.tilt_swim,
-		fall_slow = def.fall_slow,
 		-- End of MCL2 extensions
 
 		on_spawn = def.on_spawn,
diff --git a/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua b/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua
index ac5561adb..7907f8c47 100644
--- a/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua
+++ b/mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua
@@ -2,6 +2,7 @@ local vector_direction = vector.direction
 local minetest_dir_to_yaw = minetest.dir_to_yaw
 local vector_distance = vector.distance
 local vector_multiply = vector.multiply
+local math_random  = math.random
 
 --[[
  _   _                     _   _ 
@@ -208,7 +209,7 @@ mobs.projectile_attack_walk = function(self,dtime)
 
     --do this to not load data into other mobs
     if not self.projectile_timer then
-        self.projectile_timer = self.projectile_cooldown
+        self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
     end
 
     --run projectile timer
@@ -218,7 +219,7 @@ mobs.projectile_attack_walk = function(self,dtime)
         --shoot
         if self.projectile_timer <= 0 then
             --reset timer
-            self.projectile_timer = self.projectile_cooldown
+            self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
             mobs.shoot_projectile(self)
         end
     end
@@ -291,7 +292,7 @@ mobs.projectile_attack_fly = function(self, dtime)
 
     --do this to not load data into other mobs
     if not self.projectile_timer then
-        self.projectile_timer = self.projectile_cooldown
+        self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
     end
 
     --run projectile timer
@@ -301,7 +302,7 @@ mobs.projectile_attack_fly = function(self, dtime)
         --shoot
         if self.projectile_timer <= 0 then
             --reset timer
-            self.projectile_timer = self.projectile_cooldown
+            self.projectile_timer = math_random(self.projectile_cooldown_min, self.projectile_cooldown_max)
             mobs.shoot_projectile(self)
         end
     end