These finger print readers, as anyone who has used one "on a smart phone" would know, don't do well if you have anything on your fingers at all (grease, water, gloves, etc.). This is the proverbial "magic button" people are looking forward to make their guns secure, yet, unwittingly, unusable. When you have considerable room for error, and there is plenty here, it is effectively useless. I've used a firearm when a would-be burglar attempted to enter my home and I will tell you there is no time for fuck-ups and repositioning your finger while Siri says "I'm sorry, I didn't get that." How little time am I talking about? A window shattered and I was firing before the glass hit the floor.