The muzzle is equipped with an oblique-cut muzzle anti-jump device.
What we see now is generally AKM, not the original AK-47 Kalashnikov. During the period from 1953 to 1954, the AK-47 was improved and finally finalized as AKM, which was equipped by the Soviet army in 1959. The main feature of AKM is to replace AK-47 3 milling machine case with punching and riveting case, which greatly reduces the production cost. Moreover, the new punching machine case is lighter than the punching machine case of AK-47 1 and the milling machine case of Model 3, and the improved AKM weighs only 3. 15kg. AKM, named avtomat Kalashnikov modernizirovanyi, is an improved version of kalashnikov automatic rifle. This weapon has become the most productive and influential AK gun so far.
The main improvements are as follows:
The weight of rifle is reduced, mainly by using a large number of stamping parts and changing riveting into welding. For example, the cylinder seat and tailstock are spot-welded on the U-shaped box body with the thickness of 1mm, and the frame bolt guide rail is also stamped and spot-welded on the inner wall of the box body; The magazine was changed into light alloy, which can be used with the original steel magazine. In the later stage, the magazine made of FRP was developed, and it can also be used completely. The stock, guard plate and handle are made of synthetic resin.
The surface of the bolt and the bolt bracket is phosphatized, and there are four semicircular notches at the front end of the piston cylinder, which are just consistent with the notches of similar air guide hoop. There is a small magazine positioning slot on both sides of the chassis, and there are reinforcing ribs on the chassis cover.
The hammer is equipped with a hammer delay body consisting of five parts, which is located near the trigger.
The measuring range of the scale is increased, and the scale is divided into 200 ~ 1000 m and 200 m; Both the cylindrical sight and the U-notch photoelectric door have reversible accessories, which contain fluorescent material radium 22 1 for aiming at night.
Use a new multifunctional bayonet (type 2 bayonet).
There is a finger slot on the guard wood, which is convenient for the shooter to control the weapon when shooting repeatedly.
The hammer delay added to the trigger group of AKM rifle is also translated as "reducer", because this device has long been misunderstood as reducing the firing rate of AKM and improving the firing accuracy. But in fact, the firing rate of AKM is still maintained at 600 rpm of AK-47, which is obviously for another purpose. Later, American firearms experts conducted countless live-fire tests on AK-47 and AKM, and analyzed the movement of the workpiece during shooting with high-speed cameras, and finally unveiled the mystery of this "reducer". In the experiment, it was found that AK's gun frame often bounced slightly two or three times after it was locked and put back in its original position. This slight rebound causes the hammer to hit the back of the bolt frame first, and then hit the needle, which reduces the force of hitting the primer. This will occasionally cause the AK-47 rifle not to fire for the primer that needs a certain firing intensity (AK series adopts floating needle, and the needle has contacted the primer in advance). In order to eliminate the possibility of misfire, a new firing assembly is designed for AKM rifle. This kind of "reducer" can delay the advance of the hammer for several milliseconds when firing, so as to ensure that the gun rack stops completely in front of the needle before firing, which is enough to rule out the possibility of refusing firing for any reason. This is one of the reasons why AK still has good reliability even if it is using some rusty primers. On the test record, AKM did not have a blind fire caused by weapons.
Re-explanation of type, caliber, full-length barrel and long empty gun
Improved AKM (type 2 7.62×38.6 870 369 3. 1 punching and riveting machine case, gun butt, wood guard and handle are all made of resin.
Improved AKM (3 type 3 7.62×38.6 880 inclined notch muzzle anti-jump device)
AKMC(AKMS) 7.62×38.6 Folding Sheet Metal
AKMH(AKMN) 7.62×38.6 5.755 with night vision sight
AKMCY/AKMSU 7.62×38.6 short barrel, a small number of special forces.
AKMC modified 7.62×38.6 640/880 3.3 airborne model. Cancel the muzzle anti-jump device, shorten the length and reduce the weight.
Product name of FBPM948 submachine gun: FBPm948 and M976 9mm submachine gun FBPm948 and M9769msummachineguns Production unit: Fabrica Militar de Braco de Plata (FBP), PT status: M948 discontinued, Trial-produced M976 gun: used to kill living targets within the range of1000 mm FBP M948 and M976 9mm submachine guns are also called FBP M48 and M76, or FMM. The gun was designed by Major Goncalves Cardoso of Portugal and produced by Plata Blaco Arsenal of Portugal. The FBP M948 was formally equipped with the Portuguese army in 1948, and it has been dismantled and stopped production, but the improved FBP M963 of M948 is still used in the Portuguese army. The FBP M976 submachine gun was developed and finalized by Portugal in 1976. Although all the production preparations have been completed, it only stays in the trial production stage because of its large size and poor appearance. Structural features of FBP M976 9mm submachine gun FBP M948 and FBP M976 are quite different in design idea and production technology. The former adopts stamping, welding and riveting technology, while the latter adopts stamping parts and barrel precision forging technology. Both of these guns have the advantages of simple structure, reliable use and low price. 1. Both guns use the working principle of free bolt machine and are ready to be hit at any time. The shapes of the two guns are basically similar, and both adopt a straight magazine and a telescopic metal stock, and the magazine also plays the role of front grip. M948 bolt machine, nested multiple springs, barrel fixing form, magazine and safety device are all directly imitations of German MP40 submachine guns. The bolt is not hollow, and the front section of the nested compound spring is 25.4 mm installed in the hole at the rear end of the bolt. Like MP40, the gun handle and safety device are also located on the left side of the gun, which is convenient for loading and unloading the magazine and pulling the gun with the left hand and pulling the trigger with the right hand, which is convenient for rapid shooting. The punching box, metal telescopic stock, sight and firing machine base are all copied from American M3 submachine guns, but some minor changes have been made. The bayonet and trapezoidal barrel were designed by Portugal itself. M976 casing is made of steel pipe, the bolt is cylindrical, and the large-diameter recoil spring is guided through the inner wall of the casing. The barrel is made of Cr-Mo steel by precision forging. This machining method can greatly prolong the life of the barrel and obtain high machining accuracy. The gun adopts a fixed barrel and is installed on the shell by press-fitting. The launching mechanism is easy to replace, and the grip safety in the mechanism plays the role of locking the trigger and locking the front and rear bolt. There is also a speed machine insurance. The obvious feature of this gun is that it is equipped with a non-fixed gun guard tube, and many cooling holes are drilled in the guard tube. 2. aiming device both guns use mechanical aiming devices. Model M948 sight is sheet, located in front of the casing, and the scale is fixed, with the range of100 m ... Model M976 sight is a cylindrical sight with adjustable height and direction. The scale is a flip scale with holes and doors, and the measuring range is set to 50m and 100m. 3. Ammunition: Both guns fired 9mm Parabellum pistol bullets. Performance data M948 M976 9 mm 9 mm muzzle velocity 390 m/s 360 m/s track range 100 m 100 m effective range 100 m muzzle kinetic energy 539.4 j theoretical firing rate 500 rounds/min 600 rounds/min combat firing rate 120. , continuous ammunition supply mode magazine capacity 32 rounds 32 rounds, 36 rounds full gun length, 807 mm 850 mm butt pull out (including bayonet), 945 mm butt retract, 645 mm 655 mm barrel length, 250 mm 250 mm rifling, 6 right-handed rifling, Right-handed gun mass excluding magazine 3.77kg 3. 12kg excluding bullets and barrel 4.5kg 2.96kg containing 32 real magazines 4.89kg 3.75kg containing 32 real magazines and bayonet 3.8kg containing 36 real magazines, magazine mass 32 empty magazines 230g32 real magazines 735g 630g aiming device, aiming device, sight, etc. /TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt； & lt/TR & gt；