I have owned & carried a MK9 for the past 6 yrs. Just recently purchased a CW45 duo-tone. I'm now considering a MK40 and was wondering if there had ever been any rumors of a 357 sig produced? Several years back I had owned a PF40 Kel-Tec with a 357 sig barrel. It was a handfull to shoot, knocking both frnt and rear sights off the pistol but the gun was way too light for that round. I had the pistol ported but no help. It was impressive to shoot & everyone wanted to shoot it.