As is clear from ammunition, the weapon is a submachine gun. The layout of the PP is bulpap, the weapon can be equipped with a removable device for silent firing, which, combined with a silent grenade launcher, makes the device doubly interesting. It is noteworthy in the weapons located controls. So the firing of the PP and from a grenade launcher is controlled by only one trigger, the switching between the parts of the weapon is carried out by a separate switch on the left side of the weapon above the pistol grip. To switch the automatic and single fire there is a switch on the right side of the weapon above the pistol grip. The handle of the bolt is placed under the handle for carrying the weapon, the upper surface of which is also a seat for additional sighting devices. From the back and the front of the handle there are open sights, which are a rear sight and a front sight, which are designed for firing distances from weapons to 150 meters, which is due to ammunition. 
Unfortunately, so far not everything is known about weapons and ammunition, but something can be assumed. So in many preliminary reviews they say that the speed of a bullet was reduced to 200 meters per second, increasing the weight of the bullet. Personally, I doubt it, but the fact that the ammunition is not quite normal can be allowed, although it is unlikely. The cartridges for a submachine gun seem to be more or less clear, there is nothing fundamentally new about them, but the grenade launcher raises a number of questions. One could assume that the grenade launcher works on the same principle as the grenade launcher part of the Canary, but the magazine with idle ammunition is not visible in the grenade launcher handle, or I simply look bad. The only possible option for maintaining the noiselessness of the grenade launcher part can only be the principle of SP-4 cartridges, but this is only an assumption, so we will wait for accurate data a little later.Separately, it should be said about the weapon shop, which does not look quite usual, having too much thickness. This four-row store is far from new in its design. So the store itself is two double-row stores with rebuilding in one row in one case, only cartridges are not rebuilt in one row, but in two. In general, it’s quite difficult to explain on the fingers, so it’s better to show a picture of what such a shop. Magazine capacity is equal to 40 cartridges, which partially compensates for its size. However, the weapon has a sufficiently large thickness, and therefore its weight will also be decent, and if the thickness in this case has little effect on the ease of handling the weapon, then the weight can be a serious obstacle to the spread of such a submachine gun.
It is interesting that the butt of the weapon is made adjustable, and its considerable thickness will only have a positive effect on compensation for the recoil of the weapon when fired. In general, this particular submachine gun must be very well controlled due to its layout and pistol cartridge. Despite the fact that little is known about weapons so far, I think this is exactly the type that was lacking. In comparison with machine guns, this machine gun should not only be safer when firing in a city with civilians, but also more effective because of the greater stopping power of the .45ACP cartridge. Although there is another side: for targets protected by high-class personal armor, this machine gun will work with very little efficiency. In short, this weapon is necessary, but how effective it will be depends on how it is used - deliberately or not.
PS In the picture, the store is not specifically from this PP, but similar in design.