http://www.thefirearmblog.com/blog/2010 ... /#comments
The question I (and many others, I'm sure) asked:
Why so short a barrel? Will there be a longer barrel/target version?
The barrel length was chosen to be the shortest possible for a 22WMR autoloader, in order to be as compact and lightweight as possible. Compact and lightweight is what Kel-Tec is known for. There are plans for a 5 inch threaded barrel for use with a flash suppressor, or even perhaps silencers. But this will not be released until we know that the extra weight of a silencer attached to the barrel will not adversely affect the hybrid locked breech system.