Fixed initial double shot issue; tweaked feel of weapons.

scenes/player_weapons/weapon_stock.gd

@@ -23,7 +23,7 @@ func _process(delta):
     if !is_active and current_time >= fire_time:
         activate()
 
-    # Move the bullet, factoring in spread angle
+    # Move the bullet every frame; stagger controls visibility, not movement
     var velocity = Vector2.UP.rotated(deg_to_rad(angle)) * shot_data.speed
     position += velocity * delta