diff --git a/core/src/mindustry/entities/comp/WeaponsComp.java b/core/src/mindustry/entities/comp/WeaponsComp.java
index d826ba555f..08d87081f6 100644
--- a/core/src/mindustry/entities/comp/WeaponsComp.java
+++ b/core/src/mindustry/entities/comp/WeaponsComp.java
@@ -166,14 +166,15 @@ abstract class WeaponsComp implements Teamc, Posc, Rotc, Velc, Statusc{
         Weapon weapon = mount.weapon;
 
         float baseX = this.x, baseY = this.y;
+        boolean delay = weapon.firstShotDelay > 0f;
 
-        weapon.shootSound.at(x, y, Mathf.random(0.8f, 1.0f));
+        (delay ? weapon.chargeSound : weapon.shootSound).at(x, y, Mathf.random(0.8f, 1.0f));
 
         BulletType ammo = weapon.bullet;
         float lifeScl = ammo.scaleVelocity ? Mathf.clamp(Mathf.dst(x, y, aimX, aimY) / ammo.range()) : 1f;
 
         sequenceNum = 0;
-        if(weapon.shotDelay + weapon.firstShotDelay > 0.01f){
+        if(delay){
             Angles.shotgun(weapon.shots, weapon.spacing, rotation, f -> {
                 Time.run(sequenceNum * weapon.shotDelay + weapon.firstShotDelay, () -> {
                     if(!isAdded()) return;
@@ -187,13 +188,14 @@ abstract class WeaponsComp implements Teamc, Posc, Rotc, Velc, Statusc{
 
         boolean parentize = ammo.keepVelocity;
 
-        if(weapon.firstShotDelay > 0){
+        if(delay){
             Time.run(weapon.firstShotDelay, () -> {
                 if(!isAdded()) return;
 
                 vel.add(Tmp.v1.trns(rotation + 180f, ammo.recoil));
                 Effect.shake(weapon.shake, weapon.shake, x, y);
                 mount.heat = 1f;
+                weapon.shootSound.at(x, y, Mathf.random(0.8f, 1.0f));
             });
         }else{
             vel.add(Tmp.v1.trns(rotation + 180f, ammo.recoil));
diff --git a/core/src/mindustry/game/DefaultWaves.java b/core/src/mindustry/game/DefaultWaves.java
index a889f9d4ba..b5f31a940b 100644
--- a/core/src/mindustry/game/DefaultWaves.java
+++ b/core/src/mindustry/game/DefaultWaves.java
@@ -266,7 +266,30 @@ public class DefaultWaves{
             }
         }
 
+        int bossWave = Mathf.random(30, 60);
+        int bossSpacing = Mathf.random(30, 50);
 
+        //main boss progression
+        out.add(new SpawnGroup(Structs.random(species)[4]){{
+            unitAmount = 1;
+            begin = bossWave;
+            spacing = bossSpacing;
+            end = never;
+            max = 16;
+            unitScaling = bossSpacing;
+            shieldScaling = shieldsPerWave;
+        }});
+
+        //alt boss progression
+        out.add(new SpawnGroup(Structs.random(species)[4]){{
+            unitAmount = 1;
+            begin = bossWave + Mathf.random(4, 6) * bossSpacing;
+            spacing = bossSpacing;
+            end = never;
+            max = 16;
+            unitScaling = bossSpacing;
+            shieldScaling = shieldsPerWave;
+        }});
 
         return out;
     }
diff --git a/core/src/mindustry/type/Weapon.java b/core/src/mindustry/type/Weapon.java
index 63a6c33ce7..2038374ad5 100644
--- a/core/src/mindustry/type/Weapon.java
+++ b/core/src/mindustry/type/Weapon.java
@@ -70,6 +70,8 @@ public class Weapon{
     public int otherSide = -1;
     /** sound used for shooting */
     public Sound shootSound = Sounds.pew;
+    /** sound used for weapons that have a delay */
+    public Sound chargeSound = Sounds.none;
     /** sound played when there is nothing to shoot */
     public Sound noAmmoSound = Sounds.click;
     /** displayed region (autoloaded) */