ammunition and your shooting skill. Keep in mind the effective range is not how far the round will travel but how effective it is at a particular range. Any round can travel a significant distance and injure someone, depending on terrain and other conditions. ...
Looks like a dandy to show off, though not of a lot of use at the range apart from testing. Alas, too rich for my blood. Kel-Tec has made a number of clunky-looking, reliable firearms at virtual bargain prices. I am somewhat surprised this did not stay in line with past offerings....