But first things first. Let's start with a pistol Serdyukov. The SPS pistol owes its appearance to two designers: P. I. Serdyukov and I. V. Belyaev. They took up the development of these weapons at the beginning of the 90-ies in the framework of the competition program "Rook". Initially, this gun was planned to be put into service instead of the APS, which partly happened, but not at all. The weapon, unlike the MTA, does not have the ability to fire automatic fire, which, however, does not make it worse or better. But this gun has retained all the “best” features of a Stechkin pistol, for example, weight. Without cartridges, the ATP pistol has a mass of 990 grams, with cartridges its weight increases to 1,2 kilograms. Although the weapon may appear relatively compact in photographs, it is not. The length of the gun is equal to 20 centimeters, while its thickness reaches 34 millimeters, which is explained by the use of a fairly roomy magazine on 18 cartridges. The height of the weapon is 145 millimeters, the length of the barrel is 120 millimeters. Thus, Serdyukov’s pistol cannot be called a compact weapon, but it is also clearly undersized to a bulky pistol for Hollywood films, which should be noted as a plus. Thus, this gun is a completely normal "working tool", and not a "scrap" of the last chance or "hand gun".
First of all, you need to deal with the numerous names of weapons, which are really quite a lot and they distinguish one sample from another only slightly. The very first name of the weapon was РГ055, so they called it the pre-production version of the pistol, which exists only in a few dozen. A louder and more famous name was the name "Gyurza", which is called the export version of the gun. Its main difference is the much higher quality of the exterior, as well as the image of a snake on the casing-gate. From 1996 to 2000, the CP1 pistol for FSO and FSB was serially produced for the year. The main difference of this weapon was the deflection of the safety bracket in front for a more comfortable holding of the weapon when shooting from two hands. Also slightly changed the cover-shutter. The ATP name has a pistol made from 2000 for the SVR and the army. It features a pistol grip, the presence of a push-button magazine latch and changed entirely. CP1M is a further development of CP1, produced from 2000 for the FSB and FSO. This weapon also has a push-button magazine latch, an automatic safety key on the back of the handle was increased, and an automatic release from the bolt delay was added when inserting a new magazine. SR1MP differs from all the above described only by the possibility of installing additional devices under the barrel of a weapon on a picatinny-type rail that is attached to the frame of the weapon. Thus, it turns out that, despite the many names, it is all the same gun.
Automatic weapons built on the use of recoil in the short course of the barrel. Locking the bore takes place with the help of a larva swinging in a vertical plane, in general, the scheme is very similar to the scheme of Beretta 92 pistols, but, of course, with differences. When fired, the powder gases tend to push not only the bullet from the barrel of the weapon, but also the cartridge case from the chamber, but since the cartridge way blocks the casing-slide, which is also coupled with the barrel of the weapon, the cartridge transmits the impulse. Despite the fact that the pressure of the powder gases on the sleeve is very short, this is enough to set in motion the casing-bolt, and accordingly the barrel of the weapon. Moving back, the barrel and casing of the bolt remain coupled, but exactly until the locking larva starts to move and does not release the bolt separately from the barrel. The barrel stops, and the shutter continues to move, throwing out the cartridge case and cocking the pistol. Having reached its rearmost point, the shutter-casing, under the influence of a return spring, begins to move forward. He removes the new cartridge from the magazine, inserts it into the chamber and pushes the barrel forward, which causes the locking larva to move and the barrel bore back to become locked.
A rather controversial point in this weapon is the automatic safety key on the back of the pistol grip. The fact is that it is made quite tight. In addition, many believe that the benefits of this key are much less than harm, because you do not press it, and the shot will not be there until the non-automatic fuse is switched. Many also call this key a relic of the past. In my opinion, such a device is very useful and leaves the automatic safety device on the trigger key far behind, but in this case it’s really hard to overuse. Perhaps it would be worthwhile to “hang up” the possibility of disconnecting and a non-automatic safety device when pressed, on the same key, then this would at least partially justify the key's rigidity, but have not done so yet. Here is such a fairly simple and interesting version of the pistol has been around for quite a long time, and we have been inventing the Swifts, and even semi-domestic production. I think that under 9x19 reinforced weapons can be very, very easily converted, if everything depends only on the price of ammunition, then you can also stop torturing PJ, especially since it is only slightly easier for PW with a metal frame.
The submachine gun chambered for the 9x21 cartridges evokes a double feeling in comparison with the pistol. On the one hand, it is quite interesting in its design, has excellent characteristics, but at the same time it is ruined by the modern quality of domestic production. The mere non-interchangeability between stores was worth something and this is at the end of the twentieth century. However, at the moment, all the negative moments are trying to eliminate, with alternate success, of course, but nonetheless.
This submachine gun was created primarily as a lightweight and compact weapon capable of stopping unarmored vehicles, as well as a means of defeating an enemy protected by personal protective equipment up to the 3 class. The effective range of use of this submachine gun is equal to 200 meters, it is limited primarily by ammunition, and not by the weapon itself, although absolutely all the characteristics of “Heather” is entirely a merit of 9x21 cartridges. At the moment there are two options for PP, CP-2 and CP-2M, the first is out of production and replaced with a modernized model of weapons. The weight of the weapon is equal to 1,65 kilogram, the length of 603 millimeter and 367 millimeters for unfolded and folded stock, respectively. The length of the weapon barrel is 172 millimeter, width 41 millimeter, height 190 millimeters. It feeds a submachine gun from detachable stores with a capacity of 20 and 25 cartridges. The magazine of the submachine gun is inserted into the shaft in the handle for holding, which is located at the place of the balance of the weapon, which significantly affects the convenience of firing, but it still could not be without an additional handle for holding. The weapon turned out quite light, compact, efficient, but not without drawbacks, of course, without even taking into account the highest quality of production.
One of the most interesting features of this submachine gun is that its automation is made according to a scheme almost anywhere in the PP not used - with the removal of powder gases for the barrel. Designers had to use just such a principle of operation of the weapon due to the fact that 9х21 munitions turned out to be quite powerful and, although it was possible to manage with standard solutions, the weapon was more tenacious with removal of powder gases from the barrel. Locking the barrel when turning the shutter. The gas piston is located above the barrel of the weapon and is rigidly connected to the slide frame. A return spring is partially located inside the hollow piston. The barrel bore is locked to the 6 protrusion behind the receiver. The trigger mechanism of the weapon allows you to fire, both single shots and a burst at a rate of 850 fires per minute. Such an unusual solution was used in a weapon for a pistol cartridge, which significantly affected the cost of this submachine gun, but it increased its service life with 9x21 cartridges.
As already noted above, the Heather submachine gun has a number of negative qualities that are not related to the quality of production. First of all, I would single out the not very successful design of the weapon in the place where the additional grip is located to hold the submachine gun. The fact is that the lower edges of the forearm of the submachine gun rather unpleasantly rest against the brush, which holds the weapon by the additional handle, and the arms, since they are made obliquely. It is difficult to call it a serious flaw affecting the characteristics of the weapon, but such trifles usually spoil the whole picture, even if the PP was completely perfect. The location of the fuse switch is quite classic on the right side of the weapon, but if it is moved to the left side, it will be available for switching with your thumb, which will make the control of the weapon more convenient and more important. But at this point there is a translator of fire modes, which, in my opinion, although it should be convenient, but the convenience of removing the weapon from the fuse is still more important. That is, I would change these elements in places. Also, it would not be superfluous to move the cocking handle to the right side. In addition, many people note that the folding butt of the weapon is too long, however, I personally did not notice such a nuance, although I don’t suffer from long-handedness.
Here is such a weapon at the moment designed in the last century under the cartridges 9х21. Why is not the development of other samples, I personally do not understand. The ammunition is excellent, the weapon seems to be nothing, too, if the quality is tightened. If everything rests only on the cost of ammunition, then the joint venture-11 in production will be released not much more expensive than the same 9х18, the only question is in the conversion of production. In my opinion, 9х21 are at the moment exactly those cartridges that could take the place of the main pistol ammunition. Of course, a bunch of weapons would have to be mothballed or sold, but in this case I think that such sacrifices are completely justified. However, “above” is more visible, and considering that 9х21 are “special”, it’s not worth hoping that they will become the main ammunition for pistols and PP.