Frankly, this rifle complex is not a new weapon at all, but the same AKS74U with additional devices installed on it, but nevertheless the weapon turned out to be quite interesting and replaced the “Silence”, standing out for its small dimensions and weight. The Canary is based on the AKS74U without any changes in the weapon itself, however, instead of a flame arrester, a multi-chamber silent-shooting device PBS-4 is installed, which prevents abrupt emission of powder gases into the atmosphere, and, therefore, eliminates this cause of the shot sound. In addition, 5,45x39 cartridges with a subsonic bullet can be used in the weapon, or rather they can not, but should be used, since only with them the firing of the weapon will correspond to the declared characteristics in terms of the sound of a shot.
Much more interesting is the grenade launcher part of the complex, which is represented by the BS-1M under-barrel grenade launcher. No matter how paradoxical it may sound, the grenade launcher is also noiseless. Naturally, the grenade shot of the most grenade-shot could not be made silently, but the process of firing the weapon itself is distinguished by a very, very quiet sound, which allows the enemy to fire at the grenade launcher without unmasking its position. It was possible to implement such noiselessness quite simply, the fact is that the grenade launcher has a separate power supply, that is, the missile projectile and the charge that the two different munitions pushes it out. In the handle of the weapon there is an 10 idle ammunition (8 for BS-1), the powder gases push the piston forward when fired, which in turn pushes the grenade launcher itself. Thus, the piston accelerates the projectile to 175 meters per second (100 meters per second for BS-1), and it leaves the rocket launcher, and the powder gases remain locked. When reloading, which is a return of the pushing piston to its original position, ramming a new expelling cartridge and charging a new grenade launcher shot, the already cooled powder gases are gradually released, after which the next shot can be fired. So Makar achieved almost complete noiselessness of the grenade launcher, well, and the explosion of a grenade launcher shot, of course, is not at all silent.
The under-barrel grenade launcher is fired by VOG-T shots, these armor-piercing-incendiary shots can be thrown to a distance of 100-150 meters, with a very favorable set of circumstances, you can throw them over a distance of 300 meters. This is the only combat version of the ammunition for this grenade launcher. In addition to him, there is also a training shot, which, in fact, is just an ordinary blank. The shots are stabilized in flight by rotation, while the movement along the barrel rifts is carried out along the already prepared grooves on the grenade launcher.
In addition to the silent cannon and grenade launcher complex "Canary" (after all, we know how to give names to weapons), there is another version of the AKS74U, which is designed for firing in low light conditions. This version of the weapon has the designation AX74UN2, and the machine gun itself is no different from the original, except the seat for the NSPUM night sight, therefore we will not dwell on this version of the weapon.
Much more interesting variant of the development of AKS74U is the automaton in the bullpup layout, namely the well-known “Thunderstorm”, which, although it has almost a complete external difference from the progenitor, but many common features are clearly visible. It is noteworthy that in this case the cartridge 5,45х39 was rejected, preferring 7,62x39 (Thunderstorm-1) and 9x39 (Thunderstorm-4) and the last version of the weapon has a barrel the entire length of 240 millimeters and this is despite the layout of the bull-papa weapon.
But you won't be fed up with some machine guns, AKS74U became the basis for many submachine guns, including "Bison", respectively, "Vityaz", "Tiss" and, I think, this is not the final, and AX74U in one form or another will be used as the basis for a new weapon.
This finally completes the series of articles about Ksyusha.