Here are some of the ideas so far just click on the pictures to enlarge them.
If you want your ideas posted here let me know.

Safety stirrup - the idea for this came after seeing a rider get caught and dragged behind his horse.

Safety stirrup - the idea is to have a leash connected to the rider that would operate the latch link when pulled.

ICG - This is my idea for a liquid fuelled machine gun simulator.

This is my idea for a water powered gun simulator.

This is my home made blank fire Claymore mine.