Which laser?

[mojobiker]

I've read enough to convince me of the virtues of having a pistol laser. I understand more training is required and I'm more than ok with that. The question I have is which one? I believe I've it narrowed to three CT models: LG-417 (front activation), LG-639 (rear activation), LG-436 (front activation, rail-mounted). Their price differences don't concern me enough to be a deciding issue. I'm currently using a GFA and really like what that did for my shooting. The LG-436 would obviously allow me to keep the GFA, but do either of the other two provide GFA-like characteristics? Does one model tend to hold zero better than the others?

[1slow]

I have used 617, 619 rear activation for several years on 2 practice and 2 carry guns.
Good points: keep my XL hands from getting slide tracked, usual laser advantages, mine kept zero (may be because they were installed on RTF and grip taped guns).
Bad points: lump on right side of gun may print, not a confortably a beavertail effect as a GFA (I shot both at Rogers), shooting left hand lump bothers my left thumb some.

If you can put up with the bulk, run X400 and DG switch, with GFA.

[part-time shooter]

I'm actually using the LG-436 on a Gen3 G26, it's the laserguard version. I bought it used from a forum member here. Aside from having to get custom kydex for it to carry it's been a great addition to the baby glock. I don't like the grip mounted versions for glocks. I pocket and belt carry it constantly and visually check it's zero a few times a week, so far it's not had any issues. I don't shoot this pistol a ton, it's got about 100 rounds a month run through it during the odd lunch hour range trip.