The structural characteristics of 9 mm light punch are small volume, light weight and large elastic capacity. The most prominent appearance feature is that the ammunition supply tools are arranged in parallel above the barrel and guided by the barrel, so as to minimize the length and height of the whole gun. The aiming mechanism has no obvious protrusion. It adopts double grips (engineering plastic grips) and telescopic butt structure, which is convenient for shooting with both hands and shoulder (similar to straight butt) during marching and has good stability. In order to reduce the weight of the whole gun, except for the important stress parts, most structural connectors are made of high-strength plastic parts and light metal parts, and the life of the whole gun is over 8000 rounds.
Generally speaking, the supply of magazines is very reliable and convenient. But for small submachine guns, its main task is to carry out short-distance assault and suppress opponents with firepower. In other words, it needs strong firepower persistence. If you fight a few times, you will reinstall it, but you will lose the initiative and be suppressed by your opponent. Therefore, a large supply of ammunition is very important for a small submachine gun. 20 rounds and 30 rounds of magazines, in the case of continuous shooting, won't last long. To ensure a large ammunition capacity (at present, the ammunition capacity of submachine guns is not less than 50 rounds), the most direct way is to make the magazine bigger and longer, but the following problems are that the longitudinal and lateral dimensions of submachine guns will be uncoordinated, occupying a large space and being inconvenient to use. If multiple magazines are used to supply ammunition at the same time, the structural design will be changed (Italian "You Man" submachine gun is the only submachine gun with four rows of single ammunition supply in the world). Of course you can play drums, but the portability is really poor. The revolutionary innovation of domestic 9 mm light punch is to find a new way and adopt a novel spiral cartridge for ammunition. What's the bucket to play with? Figuratively speaking, a barrel is a straight drum. The difference is that the drum is a radial spiral and the barrel is an axial spiral. Many readers may think that this ammunition supply is similar to American calico and Russian bison submachine gun, but it is not. Kaliko submachine gun is inconvenient to load. With the increase of load capacity, it will become more and more difficult because the spring pressure is increasing. Its solution is to carry multiple magazines at a time, and the loading is completed by the machine. There is a fake bullet in the barrel of the Bison submachine gun, which is used to push the bullet.
However, it is very convenient to push the magazine with a light punch of 9 mm, so you don't have to take the opportunity. After manual filling, it can be completed by connecting a push spring similar to a clock spring. Simply put, it is to put bullets into the bullet holes, and each bullet is supplied by its own track. The loading port is provided with bullet teeth, and the end of the bullet pulling wheel is provided with bullet pulling teeth, so that each bullet can be pulled to the loading port to wait for the bolt machine to be pushed into the bore, which solves the problems of loading and supplying bullets, and is fast, labor-saving, reliable in use and strong in environmental adaptability. At present, this design has applied for a patent. Because the rotating magazine is arranged between the sight and the camera door directly above the barrel, not only the center of gravity of the gun is symmetrical, but also the space volume is the smallest. The gun is 64 mm wide and 195 mm high. It is also made of translucent engineering plastic, which is convenient for the shooter to observe the remaining amount of ammunition.
In fact, the prototype of the gun is designed for two-way ammunition supply. In addition to 50 spiral magazines, 15 double-row multiple magazines are used and placed in the handle. However, after I decided to use the roller magazine, I gave up the idea because it would complicate the structure of the gun and reduce its reliability.