That is a real steel one, I have it and it's great. Can't be called one specifically for airsoft because of all the adaptor sizes, but you use the .22cal one for airsoft guns. What I like about this one is the adaptor can be sized via the small screw on the back, so you can use it nicely with everything from a 6.01mm tightbore to the odd KSC 6.14mm inner barrels.
One thing about that design, keep the switch at the top, if it's anywhere else the laser will wander.
Overall a great investment for airsoft guns. I paid $35 for mine at the gun store, well worth it!