iv got this one its a copy of the nd3 by laser genetics, its an OPTIMUS ND30, its about 40mw. does everything the nd3 does except for empty your bank account. Also ODICFORCE LASER does his own versions with three different power options available. He has a 30mw @ £69.99, a 50mw @ £78.99, and a 80mw @ £119.99. All three are similar to the laser genetics nd3 (nd3 is only 18mw @£350.00!) i paid £100 for my nd-30. its a decent bit of kit.. not only can it be used as an aiming device, but i use it to assist me in range finding. And obviously night shooting. i use a hand held image intensifier to spot rabbits then use the nd-30 to illuminate for the shot. I personally would go to ODICFORCE LASER.COM. or get an nd-30 if you can find one?