Bullet Shell Whistle
If you use a whistle to get peoples attention, it probably works just fine, but using a Bullet Shell Whistle will really get some extra attention.
It’s the perfect accessory for coaches, lifeguards or Drill Sergeants. This survival whistle is made from a real .223 bullet shell and features a paracord loop attached so you can hang it from your gear, belt loop or keyring. A bullet whistle tells people that you aren’t messing around.
It’s around 120 dB loud so it will get their attention for sure. It’s just $14.99 from Thinkgeek. When you say “Move it soldier”, they will know that you mean it.