The T8131G Omni air cap guard, protects the point needle. All ready damage a needle when accidentally i drop the airbrush and was without the protective cap.
When not in use you should put the protective head cover on the 360 so that the needle is not damaged if you happen to drop it.
I have never in my 14-15 years of airbrushing, dropped an airbrush accidentally. Maybe you should look into a solid holder for your airbrush such as the one Badger sells that I use.