Increasing Laser Tag Gun Range with Convex Lenses?

[Biohazard4]

So this is the case - I've bought some shocking laser tag guns to play with my friends, though I am unsatisfied with their range which is merely 5 meters. I was wondering if I could add some convex lenses in front of the laser gun in order to increase the range of the laser, would that work? Also let's say I added a sniper scope to one of them, and added a lot of lenses, obviously the ray's area of effect would decrease significantly, but will the receptor still receive the ray?

 

[Drakkith]

I'm guessing that while you might focus the beam more tightly, the overall losses from the distance and air would still reduce the intensity of the beam to levels undetectable. The best way would be to increase the intensity of the beam. At least I think.