Have you looked at one of the laser training Glocks? For the life of me I can’t remember the name but they can be found for around 175.00 if I am remembering correctly. Other than that if you are just working on keeping steady during your trigger pull in would think any cheap rail mounted laser would work.
I used one of those Glock training pistols at a gun show. I shot it great. When it comes to the real thing, not so good with the trigger. I want to practice on my pistol that I carry.
Kev - not sure I understand, are you looking at something to put a laser dot on target and see how steady you can hold it through the press (that is what it sounds like) or are you looking for a device to put in the bore and do the same thing?
What I do is dry fire the unloaded gun at a blank wall about 3 inches from the muzzle. This gives me an ultra clear sight picture without any clutter and allows me to focus on the front sight through the trigger pull. Doing the “wall drill” will allow you to practice both sight alignment and trigger control as opposed to a laser which only helps with the trigger control. Since both are important to accuracy you might as well practice both for free as opposed to spending money on a laser.
I’m not aware of any high level competitive shooters using lasers as training aids. As FTS said, just look at your sights. Get the Ben Stoeger or Mike Seeklander books instead.
I used a laser before. Better to use your sights like others said if you can do a trigger press without moving your front sight your good. Also if you’re shooting a glock you can put a rubber band through the ejection port to keep the slide out of line, and practice repeated trigger press without racking the slide.