For anyone thinking of splashing the obscene asking price of Â£1400 for one of these, be aware you'll need to do a significant re-wire of the battery-compartment area in order to make the gun useable in actual combat. I had to remove the fuse-holder and shorten all the wires after severing one and shorting the motor, which caused it to reverse polarity and run in reverse. That forced the bevel-gear against the anti-reversal latch and stripped it. The connector tabs on the motor also snapped off under pressure from the steel-stranded wires, which effectively acted like steel rods (since replaced with copper-stranded wire that flex nicely).
Apart from that the gun is a champ.