The Sig model 239 is a compact made in 9mm and .40/.357sig caliber. I have the 9mm version and I really like it. The ergonomics are wonderful. When I was in Sig armorer's school they told us not to install night sights on these but to send them to the factory for installation. If you pick up this pistol, (and it is a 239), Kurt Wickmann can install the night sights on these. Just follow the link to his website from the www.gunandgame.com homepage.
Jesse
Jesse