There is nothing special about this submachine gun, it can be seen as a shrunken G3 rifle. The semi-rigid roller locking mechanism was originally designed for the use of medium-power 7.92 short rounds, so there was no technical pressure on switching to pistol rounds. At the same time, it differed from other submachine guns of the same era in a closed-bore fire mode, which allowed it to obtain a shooting accuracy that far exceeded that of its peers.

In fact, this gun could have been manufactured a long time ago, and at the same time as the development of the G3, H&K launched the development of an improved model, which was divided into four models, corresponding to several types of ammunition equipped by NATO in the same period, of which the fourth type fired a 9x19 Luger pistol cartridge (Parabelum pistol cartridge), and the model at that time was HK54, which was the prototype of the MP5.

Trial production of the MP5 submachine gun began in '64, and it was not until two years later that it was purchased in small quantities by the Federal Government of Germany and became the standard equipment of the German Federal Police, Border Patrol and Army Special Forces.

This is a fairly sophisticated weapon, with similar machining requirements as the G3, and the use of a large number of stamped parts, which effectively reduces man-hours and material costs.

Historically, H&K has made a lot of money with this gun, because it is only sold to government agencies, not to the private sector, and the use of this weapon is the special forces and riot police of various countries, so in the eyes of civilians MP5 has become a symbol of government power.

For example, if you are wearing a desert tactical suit, holding an Uzi submachine gun in both your left and right hands, and the guy next door is only wearing a T-shirt and beach pants, but you are holding an MP5 in your hand, and in the eyes of the people, the guy in shorts looks like an FBI agent, and although you are fully armed, you are a Mexican drug dealer no matter how you look at it.

Well, it's far away, now back to the German army, 40 years of petrochemical technology is still very limited, at that time chemical fibers and nylon have appeared, plastics and organic materials have also been put into practical use, but German research in this area can only be regarded as in its infancy.

Xu Jun can get the material formula, but for the chemical production process and process problems, that is, only six of the seven tricks, fortunately, there are the world's first-class chemical companies and experts in Europe, and these professional problems will be handed over to professionals to solve.

Xu Jun first chose nylon 66 resin, which DuPont has been producing in the United States since 39 years, but they currently only use this material to make synthetic fibers, and have not yet considered injection molding it into other shapes, because the textile industry was the most profitable at that time and could obtain the most profit for the company.

DuPont has not registered a patent in Germany, and it doesn't matter if it is actually registered, German chemists can disguise it as another product, such as adding some synthetic additives, changing the process flow or something, this set of Germans has long been familiar with it.

Nylon resin will be the main raw material for the manufacture of G3 and MP5 handguards and butts, but before the mass production of this material, the first few batches of products can only use traditional wooden raw materials, and the weight will be much higher than that of 98K, but considering that the Germanic warriors are as powerful as oxen, weighing 511 kilograms should not have much effect.

Now that we have new submachine guns and automatic rifles, let's take a look at pistols. Xu Jun found that there was really no need for improvement, the pistols in the German army had been popularized, and the performance of the standard pistols that had been determined was also very good, and now all he had to do was to unify the caliber of the gun and the bullet to reduce the pressure on logistics.

The standard of the bullet is determined to be a 9mm Luger pistol bullet (Parabellum bullet), although the power is not as good as the American point four or five bullets (11.43X23mm Colt pistol bullet), but considering the muzzle velocity and ballistics, the difference between the two is not as obvious as everyone thinks. Maybe the stopping effect of the point four or five bullets is stronger, but the Luger bullet is more accurate when firing. In view of the fact that the German army has been equipped with a large number of weapons that use 9mm bullets, Xu Jun does not consider changing his course and stretching the branches.

After talking about the problem of the pistol, let's talk about the grenade, the German army is currently using the M24 long-handled grenade, which is also a fairly classic weapon, in addition to throwing at the enemy, it is also used by soldiers as a melee weapon, and many British soldiers in the British campaign died under this "war hammer" in hand-to-hand combat.

The disadvantage of this grenade was that it was too large to be carried, and German soldiers generally carried only two of them, inserted in their boots or belts. The manufacturer has prepared a special carrying bag for this grenade, which can be stuffed with five grenades at a time, but the appearance is stupid and makes people laugh, it is a rectangular glued waterproof bag.

This was originally intended for sappers and commandos, but as a result, everyone was willing to stick grenades in their bodies rather than carry this thing to the front line, in addition to being ugly, the main reason was that in a real combat environment, it was inconvenient to take bullets from inside.

Some experts say that the German grenade must have been less lethal because of too little shrapnel after the explosion, and this is used as evidence that this grenade is lagging behind the American MKII grenade.

This point of view is clearly wrong, because they completely misconceptually that the M24 and MKII are not the same in essence, it is a standard offensive grenade.

The German army advocates the offensive, they are equipped with grenades that are conducive to the use of attacks, the power of the M24 mainly comes from its charge of 170 grams, the use of the high temperature and shock wave generated by the explosion to kill unarmored targets, the designer deliberately changed the M24 shell from the cast iron of the prototype M18 to a thin steel plate pressing, in addition to facilitating processing and production, in order not to split out too much shrapnel.

This means of killing and killing the grenade from exploding on the enemy position, and the fragmentation shrapnel will hurt the personnel who are charging towards the enemy position without cover.

The MKII is a standard defensive grenade, theoretically the thrower is hiding behind a solid defensive position, without worrying about the threat of grenade shrapnel to their own side, and the scattered shrapnel is obviously more suitable for killing group targets than shock waves, so not only carved a large number of grooves on the bullet body, some even filled with steel wires and steel balls and other prefabricated fragments, in order to produce more shrapnel after the explosion, increase the lethality within the effective range.

Historically, China also introduced a large number of German M24 grenades, and also imitated some of them, but at that time few people in China understood the concept of offensive grenades, because of the lack of raw materials, so the bomb body was filled with black powder as a charge, and there were not many shrapnel of this design, and the power of the shock wave after changing the charge was also reduced a lot, and the result could not cause effective damage to the enemy, resulting in many anti-Japanese soldiers could only meet the enemy on the battlefield.

In fact, the method of converting the M24 into a defensive grenade is very simple, there was a similar invention during the First World War, that is, to put a prefabricated fragmentation shell on the outside of the bomb, or glue a layer of steel balls inside the shell, almost no technical content, can be completed by a family workshop in the countryside.

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