Personalized smart guns, which can be fired only by verified users, may finally become available to U.S. consumers after two decades of questions about reliability and concerns they will usher in a new wave of government regulation.

Four-year-old LodeStar Works on Friday unveiled its 9mm smart handgun for shareholders and investors in Boise, Idaho. And a Kansas company, SmartGunz LLC, says law enforcement agents are beta testing its product, a similar but simpler model.

Both companies hope to have a product commercially available this year.