It's a relevant topic for me because I own plunger guns and I got my kids 209 plunger guns for their birthday. Safety isn't something to take lightly. Just ask my one eyed brother who has had a glass eye for over 30 years caused by a piece of hammer on a gun blowing his eye out. Not a pretty sight when they sewed one eyelid back on in 3 pieces . he is lucky to see out of his one eye.