The KRISS Vector series of pistols are an innovation to firearm design. The Vector SDP is chambered in .40 S&W, .45 ACP. 9mm & 10mm pistol calibers and available in a number of colors. These pistols boast options such as flip up sights, pistol stabilization braces, threaded barrels, hand stops, accessory rails and more. Experience the Vector's performance which is regarded as one of the best shooting platforms for home defense; the low muzzle jump & recoil, along with easy caliber interchangeability, gives you a stable shooting platform great for any situation.