I actually run one on a Glock and like it alot, it's a strong laser and will handle abuse; the light performance is excellent as well.  I threw one on a rifle in case you were inquiring about rifle use but must admit it's not that comfortable of a setup.  If you hold the vertical grip lower down activation isn't to shabby.  Also, you'll need to remove the sling loop or fasten it out of the way of the laser.

They have both Universal and Picatinny models but they'll basically be identical to the above.   To date, there are no pressue switch options for the LAS/TAC 2 or BLAST 2.