KRISS KARD Pistol
The American company KRISS USA Inc. In February, 2010 applied for a patent (# 20070214699) for a new pistol using the original shutter retard system.
The body of the gun is made of plastic. The KARD barrel is fixed, as opposed to most conventional pistols. To ensure inertia, the weight is in front of the gun and is actuated by a bolt. A weight shifted down during recoil performs the same function (inertia) as a slinger in a conventional pistol. The recoil spring drives the bolt into the firing position, allowing it to send another cartridge from the magazine.
So what are the advantages of this system? The main advantage is that the recoil mechanism transmits part of the recoil energy in a downward direction (and in front of the gun), and not vice versa, as it happens in an ordinary gun. This should help keep weapon on purpose. On the other hand, the same effect can be achieved in this gun due to the relatively low location of the barrel axis and the presence of additional mass in the front fly area. Both of these advantages can be obtained in more traditional and proven designs of short-stroke pistols.
Another advantage is that, since the upper part of the pistol does not have barrel guides (skids) and is stationary, optics can easily be mounted on it, which will further increase the accuracy. Although this question is quite controversial, since most modern pistols are already more accurate than their users. A fixed barrel can provide better accuracy, and it will be easier to fasten silencers and flame arresters, as well as other devices, onto it.
The disadvantages include the following. A semi-free-bolt system may have strength problems, which may limit the use of more powerful ammunition. There are many doubts about the safety and reliability of this gun. The pivot weight must remain in the lower position until the bolt returns and slides the cartridge into the chamber. If this mechanism is stuck in the lower position, the gun will turn into a system with a straight stroke of the bolt. And this is likely to lead to rupture of the liner and the destruction of weapons.
Those who wish to get acquainted in detail with the principle of the action of weapons can do this by studying patent.
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