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Is the Japanese Type 62 machine gun rubbish? Why do people say it is bad?
When talking about Japan's conventional weapons, it is inevitable to think of the "crooked" machine gun and the "38 big cover" automatic rifle in the anti-Japanese movie. Although these guns developed in the early stages of World War II were not as good as the conventional weapons of the best infantry regiments at that time, they were still useful. But after the end of World War II, the next-generation Type 62 machine gun equipped by the Japanese Ground Self-Defense Force was basically a piece of black material in the history of Japanese conventional weapons product development. The user evaluation in the army is not as good as the "crooked gun" used during World War II. Some soldiers asked God for blessings before using the gun so that nothing would happen. The origin of the "Waibaozi name"
In fact, many people in the "Waibaozi machine gun" are wondering why it has such a crude name since it is a machine gun? And this needs to start with the appearance design of the crooked handle. In 1904, there was a confrontation between Japan and Russia. At that time, Japan and Russia fought violently on Chinese soil in the three northeastern provinces of our country. Although the battle ended with Japan's victory, Japan also entered the imperialist stage because of this battle. Team. However, Japan's damage in this battle was not great, because in this battle they saw the destructive power of machine guns against infantry regiments, and Japan was a weak point in machine guns, so they prepared to develop a machine gun of their own.
Unfortunately, because I have no experience in these aspects, the machine guns developed through research are a bit strange. Japan itself is a country with weak resources, and machine guns are not excluded. At that time, in order to save resources, it chose to use automatic The rifleman uses the same 5-round magazine to feed ammunition, but this will cause the soldier's field of vision to be blocked when aiming. In order to solve this plan, the grip was moved to the side during the design. right.
The designer thinks that this can make up for this shortcoming, but during the actual shooting process, the barrel and the grip of the "crooked machine gun" are not on a parallel line, and the result is It turned into that weird look, so at that time everyone called this Japanese machine gun a "crooked gun." The Type 62 machine gun came out
It is said that after Japan withdrew its troops in World War II, all its armed forces were eliminated, and the US military was solely responsible for docking. However, the American army initially served as a social security force in Japan, which was quite satisfying for free, but it also became annoying when there were too many things to do. Therefore, by 1950, a Chinese police reserve force was formed under the command of the U.S. Army with a complete set of American weapons and equipment. By 1954, foreigners thought that the Japanese would no longer have any crooked ideas, and continued to approve the Japanese Monsoon Paddy Agricultural Self-Defense Force. The Japanese can also be regarded as having a regular army. Then the question arises, what to do with this gun.
At that time, all the weapons and equipment they had on hand were the U.S. Army’s M1 Galante/Carbine BAR 1928A2 sniper rifles and M1919A4/A6 machine guns. Especially the BAR and M1919 were very powerful during World War II. It was outdated, and after the war, all countries in the world were learning from the Italians' concept of universal machine guns, so the Japanese had no doubt to follow suit. Therefore, Masaya Kawamura, the firearms designer of the Japanese metal industry company at that time, In the same year, product development was gradually completed.
In 1956, the Type 62 prototype machine gun was released (they called it the 1931 trial model). Does this thing in the picture remind you of anything? Yes, the so-called 62-pass machine gun is that the Japanese changed the Type 99 light machine gun to a belt-fed ammunition. Of course, this kind of behavior must have been the "Malu Yelang" aggressively beaten by the Self-Defense Forces. By the 1960s, the trial model was somewhat normal.
As of 1962, the products sent were of course the 7.62x51mm full-kill automatic rifle ammunition of NATO member states, but the Self-Defense Forces chose the reduced-charge version, but it could also send standard ammunition. The Type 62 machine gun is a long-stroke machine gun based on the piston rod gas guide principle. I originally thought that it uses a clamping iron lift-off lock like the Type 99, but after looking at a Japanese army album, I found that it has an offset bolt type. , this can be considered as some enlightenment.
Disadvantages of the Type 62 machine gun
First of all, let’s look at it. As a general-purpose machine gun, does your barrel look a little weak? Yes, at that time Kawamura Masaya was thinking about reducing the fat of the general machine, so he designed the barrel wall and the chamber wall to be very thin. This thinness creates two problems. One is that the vibration of the barrel is very large during continuous firing, and the spread is also increased. The other is the thermal tolerance of the thin wall. A barrel that overheats too early will change the original vibration frequency, further affecting the thermal tolerance of the barrel. Harms precision.
In addition, if the bore wall is too thin, the stickiness of the shell will be aggravated, making it difficult to extract the shell after being fired. Generally speaking, the method of extracting the case is either to brush the oil, or to imitate the G3 and carve grooves on the inner wall of the chamber, so that the explosive gas can move the air cushion cc in the center of the chamber shell. But neither does Kawamura Masaiya. It uses too many air inlets and creates sufficient recoil momentum to pull out the cartridge case by increasing the outlet air holes.
Not to mention whether it is easy to break the casing by pulling (it is said that it has a system that slows down the engine casing speed to avoid the problem of casing breakage), but the recoil speed of the entire machine frame Or quickly, which results in the entire receiver having to be made thicker to maintain sufficient strength. Good guy, then the net weight saved from the barrel is equivalent to being added to the receiver.
Its reverse hook (block iron) is at the rear end of the receiver, which is also a very good design. The Type 62 is a machine gun that is ready to be fired. If you want to stop fighting during automatic shooting, you have to loosen the bolt, and then the sear lifts up and hooks the machine frame. Generally speaking, the iron blocker should be placed closer to the front, so as to ensure that the machine frame will be hooked when it returns. However, if it is too far back, it may cause the frame to "miss" the blocker when the rear seat is not in time, or it may cause the frame to be shaken due to a violent impact on the bottom of the case. Failure to hook the sear will cause the gun to fail to fire even if the bolt is loosened.
The main problems with this gun are:
1. The barrel wall is too thin, with poor thermal tolerance and poor accuracy.
2. The chamber wall is too thin, which can easily cause the shell to stick to the chamber due to overheating. It also requires excessive air intake and a complex shell extraction deceleration mechanism to avoid the problem of shell breakage.
3. Excessive air intake causes the recoil impulse of the machine frame to be very large. The wall of the receiver needs to be strengthened, resulting in a wasteful reduction in barrel weight.
4. The rear trigger block may cause the gun to fail to stop once it hits.
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