Rating: High rate of fire, low recoil, and high accuracy make up for the slightly lower power. This compact weapon is used by commandos around the world. It can be modified to silence and 2- or 3-shot burst mode. It is huge
Its firepower can defeat tenacious opponents in a short period of time. It has high accuracy, fast reloading, and can easily shoot out the bullets in the magazine. It is a truly mature weapon at a moderate price and has become the weapon of many in the world.
The preferred weapon of choice for special forces.
Design principles
In the autumn of 1966, the West German Border Guard named the trial MPHK54 submachine gun MP5 (Maschinen-pistole 5, "machine pistol" type 5). This trial name is still used today. In the same year, the Swiss police also adopted the MP5, becoming the first
In countries other than Germany that use MP5, Spanish special police are gradually equipping them. The 1970s was a crazy era of urban guerrilla warfare. Terrorists often used powerful submachine guns and assault rifles when attacking important figures. The guards who protected important people felt the need for the same firepower.
It is a violent fully automatic weapon. In order to enter and exit public places, this weapon needs to be hidden under clothes like a semi-automatic pistol to avoid attracting attention. The MP5 meets the above requirements. Moreover, the gun uses the same technology as the HKG3 automatic rifle.
Roller locking system. The MP5 basically refers to the design of the HKG3 7.62mm automatic rifle. The outstanding features of the HK company are all reflected in the MP5: reliable, easy to use, easy to maintain and safe.
Roller locking system
A very high rate of fire (more than 900 rounds/min) can be obtained. The famous MG42 machine gun during World War II also used the same principle, but there are differences in the mechanical structure. When the movement of the roller locking system starts, the gas in the barrel
The pressure is still very high. If it is not restricted and the movement speed of the bolt is slowed down, a shell explosion accident may easily occur.
The roller locking system cleverly slows down the speed of unlocking. The technical term is called "roller delayed unlocking". When shooting, the expanding gunpowder gas in the barrel pushes the cartridge case backward, and the cartridge case pushes the bolt backward.
However, because the roller is stuck in the groove of the barrel sleeve, the movement of the bolt is restricted, and the gun chamber cannot be fully opened. The roller squeezes the wedge iron under the action of the recoil, and the slope of the wedge iron is in contact with the 8mm diameter roller.
The combination of the bolt frame and the bolt allows the speed ratio between the bolt frame and the bolt to reach 4:1, achieving the purpose of accelerating the movement of the automatic machine. The bolt can be fully opened only after the bolt frame moves backward 4mm. The whole process is a
The gradual change process from slow to fast avoids violent collisions between mechanisms.
The roller locking system completely relies on the recoil force of the gun to work, so it is very sensitive to the recoil speed. If there is a foreign object in the barrel, or a powerful high-pressure bullet is fired, the cartridge case will fit into the gun bore, and the extraction force will be too large, resulting in excessive recoil speed.
Low, the automatic machine cannot obtain enough recoil energy, which will cause the firing cycle to be interrupted. In order to avoid such a failure, the MP5 barrel has longitudinal grooves on the inner wall of the chamber: on the one hand, it can reduce the friction between the cartridge case and the barrel
;On the other hand, it can balance the pressure difference inside and outside the cartridge case to prevent high-pressure bullets from sticking to the chamber.
The roller locking system has a high rate of fire of more than 900 rounds per minute, and the bolt moves violently. During the shooting cycle, it often occurs that after the bolt is retracted into place, it collides with the rear of the barrel and rebounds, resulting in non-locking failure. The result is an automatic
The shooting is interrupted. Therefore, the automatic machines of high-rate automatic weapons have "anti-rebound devices".
However, compared to rifle ammunition, the 9x19mm pistol ammunition used in the MP5 is relatively low-power, so the MP5 does not use the claw-type anti-bounce device of the G3. The bolt frame of the MP5 is a 3-piece welded structure, forming a hollow structure.
The space inside the bolt frame is filled with 32.5 grams of tungsten sand. The density of tungsten reaches 19.25 grams/cubic centimeter, which is 2.5 times that of steel. Filling the steel bolt frame with high-density tungsten can increase the
The weight of the automatic machine makes it have more sufficient movement energy and the mechanism action is more reliable; on the other hand, because the tungsten sand is loose, when the bolt rebounds, the inertia of the tungsten sand can just play a role in suppressing it.
A simple but effective anti-bounce device.
safety device
The MP5 is used by military and police forces in more than 50 countries around the world. There are 120 types of deformable guns to meet various tactical needs. There are also a variety of optional butts, forearm guards, sight holders and other accessories. The optional trigger group includes
Single shot, fully automatic, two or three shot burst.
in,
① The safety twist is marked with S (Sicher in German, corresponding to Safe in English, "safety"), or a crossed white bullet, indicating that the gun is in a safe state;
② The safety knob is marked with E (Einselfeuer in German, corresponding to one-fire in English, "single shot"), or a red bullet, which indicates that the gun is in a semi-automatic state and can only fire one bullet each time the trigger is pulled;
③The safety knob is marked with F (German Feuerstoss, corresponding to English fire, "shooting", "continuous fire"), or 5 red bullets, indicating that the gun is in a fully automatic state. Hold the trigger and keep firing the bullets.
over.
④The safety knob is marked with 2 or 3 red bullets, indicating that the gun is in burst firing state and fires 2 or 3 bullets each time the trigger is pulled.
Through different combinations, a variety of different emission modes are produced.
For example
SEF, insurance-single shot-continuous shot, the most basic mode, abbreviated as (015);
NT (N**ytrigger), "Navy trigger", also in SEF mode, with safety buttons on both sides of the gun, and can be operated by both left and right hands, referred to as (NT);
Pure 2-shot burst, insurance-single-2-shot burst, abbreviated as (012);
Pure 3-shot burst, insurance-single-3-shot burst, abbreviation (013);
fire mode
According to the different firepower modes, each MP5 model has five different firepower configurations: (NT), (0125), (0135), (012), and (013).
The magazine buckle of the MP5 is specially designed. The magazine catch controls the opening and closing of the magazine buckle through a slope. The magazine can be replaced in two different ways: like the M16/M4, you can directly use the right index finger to press the right button.
Press the magazine button, open the magazine buckle, and the magazine will automatically fall off due to its own gravity; you can also hold the magazine with your left hand like the AK-47, and at the same time press the magazine catch with your left thumb, and pull out the empty magazine with your palm.
The MP5 submachine gun series includes: MP5A basic series, MP5SD micro-acoustic series and MP5K ultra-short series. The initial MP5 used straight magazines, and later all used curved magazines. Among them, the MP5A2 is a prototype gun with a fixed butt.
, MP5A3 uses a retractable butt, MP5A4 and A5 add a 3-round burst firing mechanism, and the grips of several other MP5 models are also slightly different. In CS, the A5 is used as the base model with the optional "NT Navy Trigger Group" (N
**yTrigger, SEF mode, there are safety buttons on both sides of the gun, and it can be operated by both left and right hands) 9mm MP5-N (N means N**y, Navy). The main difference of MP5N is the increased resistance to seawater corrosion, in order to increase reliability
; The front sight is equipped with fluorescent dots, which can also aim in dimly lit environments; and the muzzle is threaded, and a stainless steel silencer can be installed (the effect is better when used with subsonic bullets).
Various models
MP5A: Basic type (950 rounds/minute)
MP5A1: No support. According to the different firepower modes, each MP5A model derives 5 different firepower configurations (NT), (0125), (0135), (012), (013);
MP5A2: Baseline model, fixed plastic stock, with 5 different firepower configurations (NT), (0125), (0135), (012), (013);
MP5A3: Metal telescopic bracket, with 5 different firepower configurations (NT), (0125), (0135), (012), (013);
MP5SFA2: fixed stock, SF trigger (single shot only);
MP5SFA3: Telescopic support, SF trigger;
MP5-N: Customized model by the U.S. Marine Corps, NT fire mode; the front sight is equipped with a tritium light source, which can aim in low light conditions; the muzzle is threaded, and a stainless steel silencer can be installed;
MP5F: French army customized model, France;
MP5/10: uses 10mm Auto ammunition version, customized at the request of the FBI (FBI);
MP5/40: uses .40S&W ammunition version;
MP5K: K is the abbreviation of German Kurz, which means "short". 115mm short barrel model (1100 rounds/min),
MP5K short barrel, bullpup, with 5 different firepower configurations (NT), (0125), (0135), (012), (013);
MP5KA1 short barrel, fixed stock; MP5K (w/bc) Brief-case, can be fired hidden in a briefcase;
MP5K-NNT fire mode, the front sight is equipped with a tritium light source, which can aim in low light conditions; the muzzle is threaded, and a stainless steel silencer can be installed;
MP5K-PDWPDW is the abbreviation of "Personal Defense Weapon" PersonalDefenseWeapon. It is equipped with a plastic folding stock on the basis of MP5K-N. MP5SD: SD is the abbreviation of German SchallDaempfer, which means "silenced". Silenced model (900 rounds/minute