I have one here and don't know too much about it. I've heard it's more a collector's item than a field run and shoot Airsoft...
It's pretty neat how it has real action with a 1:1 plastic casing that pops out with every shot.
The casing pops out when you pull the trigger all the way back.. but be aware of the sliding action that pops out the back if you keep it too close to your face you might get an unpleasant surprise...
If anyone has any info on it please give me a shout... I'm actually quite interested in what it's worth...