One of the disappointments to me when first acquiring guns like the 17R, was that the trigger, although it does reset, does not act exactly like the regular 17 counterpart, which, in my opinion, was entirely the point of using it for classes and training folks. The trigger has a different feel to the travel, doesn't have the same break, and frankly, does not actually train the user(s) in using a Glock on the trigger as well as other third party solutions. Therefore I've moved to the Simunition Pistols and then the Dvorak Tetherless system for actual trigger training. Everything else (sight picture, fitment, and even trigger feel up to a point, works well with the 17R, until you want to pull the trigger, or take a follow up shot without the pretravel). The Simunition actually ejects casing if using the blanks, and can also fire the marking/nonmarking rounds, which is a plus if you need to shoot at targets. The Dvorak (infrared system usually, but can also be visible dot) has to have a special mag insert, but you can buy their new type which is refillable, so no co2 cartridges. I've also tried the reset trigger from GlockStore, and it seemed to work well - have never tried putting one of those into the 17R though. I believe it might fit with some possible smithing changes, since the 17R has some singular components to do what it does.