The history of submachine guns - Thesis

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Introduction
To increase the infantry firepower in the First World War, new requirements for small arms were put forward. Troops needed to be equipped with high-speed automatic weapons


The history of the development of submachine guns
The appearance of a submachine gun is a sample of the intermediate type, combining the qualities of both rifles and pistols.
Since the use of cap ignition were made revolvers with attached butts.

The principle of operation of submachine guns
After some lull in the 20s. submachine guns begin rapid development from the beginning of the 30s. It was created many samples of submachine guns, outwardly often even very dissimilar to each other, but in principle their devices were almost the same as each other. Such “unanimity” of designers, who worked in different countries and in different conditions, is explained by the fact that by the time of the development of submachine guns there were real prerequisites for quickly achieving the optimal scheme.

The advantages and disadvantages of submachine guns
Comparing the weight and dimensional characteristics of modern submachine guns, we can conditionally divide them into two classes - light and heavy. For light (weighing up to 2 kg) are foreign “Scorpion”, “Micro-Uzi”, TMP, MR 5K and domestic “Cypress”, “Klin”, “Kedr”, PP-90.

7.9 - mm submachine gun "Bison"
The main and most original break of the new submachine gun, which favorably distinguishes it from a number of fellows, of course, is the screw mechanism, which holds 64 cartridges. This capacity is chosen on the basis of the fact that the number of cartridges to be charged is a multiple of the number 16 - the contents of 1 carton pack, in which they are packaged in factories. Thus, the design of the store has a reserve and, when a change is made in it, the capacity can be increased. The store does not stand for the size of the weapon and provides it with excellent overall characteristics. When firing it can be used as a forearm, which increases the ease of retention, makes the "Bison" an applied and rather maneuverable melee weapon

PP-93. PP-90
Submachine gun PP-90 (PP-93). The folding submachine gun was developed in Russia by the instrument-making design bureau of the city of Tula on the order of the ministries of defense and internal affairs.

9mm submachine gun PP-93
Reliability and simplicity of the device weapons provided by the automation scheme with a free gate.

Submachine guns PP-90 PP-90M, PP-90M1
Efficient automatic weapons that have an unconventional shape when folded, convenient for concealed carry. It takes no more than three seconds to bring to the fighting position and open fire.

Conclusion
The invention of submachine guns made a big step forward in the development and improvement of small arms.