law allowed domestic production (as opposed to importation) of the PPK, manufacture began under license in the U.S. in 1983; this version was distributed by Interarms. The version currently manufactured by Walther Arms in Fort Smith, Arkansas has been modified (by Smith & Wesson) by incorporating a longer grip tang (S&W calls it "extended beaver tail"), better protecting the shooter from slide bite, i.e., the rearward-traveling slide's pinching the web between the index finger and thumb of the firing hand, which could be a problem with the original design for people with larger hands or an improper grip, especially when using more powerful cartridge loads. The PPK/S is made of stainless steel. There are also blued examples. The PPK/S differs from the PPK as follows: Overall height: vs. 100 mm (3.9 in) Weight: the PPK/S weighs more than the PPK The PPK/S magazine holds one additional round, in both calibers. The PPK/S and the PPK are offered in the following calibers: .32 ACP (with capacities of 8 for PPK/S and 7 for PPK); or .380 ACP (PPK/S: 7; PPK: 6). The PPK/S is also offered in .22 LR with capacity of 10 rounds. PPK-L In the 1960s, Walther produced the PPK-L, which was a lightweight variant of the PPK. The PPK-L differed from the standard, all steel PPK in that it had an aluminium alloy frame. These were only chambered in 7.65mm Browning (.32 ACP) and .22 LR because of the increase in felt recoil from the lighter weight of the gun. All other features of the postwar production PPK (brown plastic grips with Walther banner, high polished blue finish, lanyard loop, loaded chamber indicator, 7+1 magazine capacity and overall length) were the same on the PPK-L. PP Super First marketed in 1972, this was an all-steel variant of the PP chambered for the 9×18mm Ultra cartridge. Designed as a police service pistol, it was a blowback operated, double-action pistol with an external slide-stop lever and a firing-pin safety. A manual decocker lever was on the left side of the slide; when pushed down, it locked the firing pin and released the hammer. When the 9×19mm Parabellum was chosen as the standard service round by most of the German police forces, the experimental 9mm Ultra round fell into disuse. Only about 2,000 PP Super pistols were sold to German police forces in the 1970s, and lack of sales caused Walther