Beamhit (www.beamhit.com, 800-beamhit) can perform a conversion on a Glock which will allow for repeat dry firing. You don't need to purchase the laser system for this conversion, but the conversion is semi-permanent. You would have them install or remove it, and the conversion blocks the firing pin. This would be useful if you can get an inexpensive used Glock for dedicated dry firing. Cost of the conversion is $175.