![Image](http://i.imgur.com/K2Y10mYh.jpg)
Internal diagram showing the unconventional mechanism. The barrel assembly is pushed forward against a spring and held by the trigger. A BB from the ammunition tube can fall into the breech and is held in place by a magnet. When the trigger is pulled, the barrel assembly moves towards the rear, picks up a BB and then knocks the valve open, firing the BB.
![Image](http://i.imgur.com/ShJR9nch.jpg)
Breech detail:
![Image](http://i.imgur.com/5FVFW7Kh.jpg)
Breech with stock removed:
![Image](http://i.imgur.com/T18W5Zvh.jpg)
Barrel and action disassembly:
![Image](http://i.imgur.com/nf8SCR2h.jpg)
Internal parts detail:
![Image](http://i.imgur.com/hOBRetXh.jpg)
Barrel and breech assembled, note the cocking bolt accompanied by a smaller bolt on a slip ring that serves as the safety:
![Image](http://i.imgur.com/K9WYFHxh.jpg)
The plan for this one is to turn it up to eleven, basically make an HPA chamber with a greater volume and that can take higher pressure, and a balanced valve in order to be able to use the original hammer mechanism at greater pressure. Here is a tentative diagram of what it might look like, although I'm not entirely happy with it:
![Image](https://i.imgur.com/xwIugWT.jpg)
A contemporary ad for the model indicates a velocity of approximately 650 fps, I'm sure we can do better:
![Image](https://i.imgur.com/KeU2hHp.jpg)