So I've been watching videos about the Mantis laser dry firing system, and other brands, for practicing drawing and shooting indoors at home. Have any of you used any of these systems and what is your opinion of them? Have you used the kind where you place a "cartridge" that projects a laser inside the chamber of your pistol, and does a lot of dry firing damage your gun over time? In principle, it all sounds like a clever way to practice, but the systems are not cheap, so I would love to get some feedback before investing. Thanks.
