If you're LE call KelTec and you'll get one quickly and for cheap. Unfortunately the 2 people I know who own these have both had to send them back for repairs. Maybe they re older models or something and these problems have been fixed but I wouldn't pay that much for one of these yet. However it's a great idea and they are a ton of fun to shoot.
1) the KSG == Titties!!!
2) Carlson's Enforcer does a great job keeping the muzzle on target while greatly reducing the fireball produced by full load 00-9's