I havent seen alot of threads on collectable S&W autos so here one is. The 4006 was made in 40sw in several different configuration. Besides the shorty forty and performace center pistol of this variation one of the most sought after models is the 4006 custom it came all stainless including hammer trigger and slide release... What made these different from other 4006 is the hammer was bobbed and serrated, protected adjustable sights and the frame was notched at bottom in front part of grip in case mag would not come out it could be pulled. These were for mostly goverment contract and very hard to find compared to other 4006 models. No this one is not for sale.