I have a customer (purchased a propane adaptor) who is a training officer at a police acadamy. He uses several metal slide upgraded G17 GBBs as a training aid for car "pull over" scenarios. Trainees approach a car which they have notionally pulled over. They may be confronted by a simulated intoxicated driver or a domestic dispute. In some cases they may be fired upon by a driver or passenger of the car they pull over.
The scenarios teach trainees how to approach a vehicle and reduce their chances of being shot and to recognize aggressive motions.
Want nearly free GBB gas?