If I may jump in here,, As an ex Firearms instructor,, valid points are being brought up here.Yes Dave, (airathol) you are correct,, many are killed by "unloaded" guns every year for shure. Yes it seems CRAZY to blow into the end of an airgun,, I agree,, however,, at 49 years old with a "fair" amount of time around guns,, I do it all the time!!!! It has proven to me to be a very simple & effective way to check breach seals. Of course it can also be an indicator of a bad piston seal as well. It is pretty simple to be 100% shure that a spring piston gun stands NO chance of being loaded. Dont try this at home!!LOL!! Tim.