Yes, I have them on both my Model 432 and 642. I've tried both the CT and Lasermax grips. Neither are perfect, but the Lasermax are slightly better in my opinion. CT has much better customer service. Lasermax's customer service is basically keep your shirt on, we'll get to you eventually - if you take my meaning. The big plusses of the Lasermax, besides the price are: 1) pulse vs. steady beam laser, 2) laser is mounted higher on the weapon, so it doesn't interfere with your trigger finger alongside the outside of the trigger guard, 3) ambidextrous on/off switch. My main complaint is that the on/off switch is a little too easy to activate, and the laser will go out automatically after 30 minutes. Now what BRAIN SURGEON came up with 30 minutes for a shut-off time? It should have been more like 3 minutes MAX! This means the batteries could burn out on you pretty readily. I change the batteries without fail every 6 weeks or so just to be on the safe side. By the way, the laser gives my wife enough confidence to feel she could use the pistol in a life or death situation.
Regards,
Dave