OK, so um...can that be made into something as small as...a quarter of a pencil?Assuming I'm getting this right, the Schrader valve goes into the lyre cap, where air is the pumped in, the hammer is screwed into the chamber at the right side. When once pushes the rod , the hammer will go left and ir ...

Um, any idea on how to make that hammer valve?Or like a miniature version of it?

Also, if possible (sorry to double post, but I need to sleep now) I would also like to somehow make this gun semi automatic with around 3 shots

The hammer valve looks awesome, BUT, I need it small, I'm thinking of building a hand-gun sized air gun, the air tank will be the in the gun's grip

Recently, I became curious in air guns and the like, now, I need a valve similar to a Schrader valve. The Schrader valve basically ejects air if the top is pushed down, like this http://www.capsuretirecaps.com/images/animation_schrader_valve_opening_and_closing_on_a_tire.gif but my question here is,...