P403 KUMON, it has "Pull-Bolt-Release-system".
The shape of the holding hooks seem like one of the hiragana that is the japanese-character and is pronounced "KU".
The name KUMON (KU + MONJI) means "KU of the hirabgana".
And it also has a meaning of the "9 Gates" in Japanese.
The way of loading confuses the shooter a little.
First, you need to pull the Sliding-Bolt backward. And load the rubber bands from the holding-hooks to mazzle-hook.
And next, the Sliding-Bolt must be closed.
Last, pulling the Charging-Piece.
The straight frame panel.
The grip design.
The right side view.
The left side view.
Made from japanese tilia plywood, cypress and ramin. The materials of the grip are keyaki (japanese zelkova).
It must be called "Pull-Bolt-Open-Release-System" or "Gate-Open-Release-System".
Please watch Video.
<Completion Date> 2012/06
<Model Name> P403 KUMON
<Category> HAND GUN
<Length> 360 MM
<Barrel Length> 245~309 MM
<Capacity> 9 rounds
<Ammo> #16 Rubber Band (Japan Industrial Standards)
<Action> Semi-Auto/ Manual-Pseudo-Full-Auto