How powerful is the miniature rifle ak74u? Whether it works or not, talk about the advantages and disadvantages!

AKS-74U was improved by the former Soviet firearms designer on the basis of AK series rifles. It was manufactured by the national arsenal of the former Soviet Union, finalized and produced in 1974 and installed in 1977. The gun uses a small caliber and fires a specially developed 5.45 mm bullet. The length of the barrel, the winding of the rifling, the shape of the bore, the automaton and the ammunition feeding mechanism have all been improved. Some of these parts can still be used with AK-74. The charge of the bullet is 5.45× 39mm, the caliber is 5.45mm, the total length is 730/490mm, and the barrel length is 2 10/0mm. And muzzle velocity 735 m/ S calibration range 500 m aiming baseline length 235 mm empty gun weight (including magazine) 2.7 10 kg effective range 200m theoretical firing rate 650- 1000rds/min using bullets 5.45×39mm charge 30/ 45rds caliber 5.45mm total length 730/490 mm. Kloc-0/0 mm muzzle velocity 735 m/s caliber range 535 AKS-74U is mainly equipped with special units, airborne troops, engineers, signalmen, artillery, vehicle drivers, aircraft crew, command troops and special forces of law enforcement agencies, with a considerable amount of equipment, while AKMSU short assault rifle was equipped with only a few special forces before it. Before the Soviet troops withdrew from Afghanistan, it was often seen that soldiers in Kabul hung this weapon on their shoulders, and the crew of Mi -24 helicopter often hung it beside the driver's seat or at the driver's feet. Because the barrel of AKS-74U is short and the air guide hole is too close to the muzzle, the muzzle is equipped with another flame suppression/gas expansion chamber device. This muzzle device is a single-chamber structure with no vent holes. The function of the large expansion chamber is to fully expand the unburned gunpowder gas, thus reducing the muzzle flame. However, the muzzle device has no recoil, and the firing rate of AKS-74U is relatively high, rising from 600 rpm of AK-74 to 700- 1000 rpm, so the recoil of shooting is increased. In addition, there are two notches on the horn of the flame arrester, which are used to clamp the wire and interrupt it with bullets. Although the gauge range of AKS-74U is 500m, the actual use range is usually within 200m, so AKS-74U is equivalent to submachine gun in tactical use, but the power and effective range of rifle bullets are greater than those of pistol bullets. Interestingly, the gun body of the same type of weapon XM 177 series of the US military is marked with submachine gun, which has the same function but different names. The hammer reducer of AK-74 was cancelled in the firing mechanism. On the trigger assembly of AKS-74U, the upper half of the hammer reducers on AKM and AK-74 rifles were removed, leaving only the lower half as a buffer to prevent the hammer from hitting back and damaging the trigger assembly when pushing the hammer behind the gun rack. The trigger/resistance iron of AK-74 rifle is fixed with a round pin. The design of AKS-74U gearbox cover has changed. This structure first appeared on AKMSU, and earlier raised the problem that the potential gearbox cover of AK was difficult to assemble correctly. When the lid behind the lid is pushed forward, as usual, the back of the lid will be lifted, but at this time, the lid cannot be taken out independently, and its front end is hinged on the gauge seat. Subsequently, the re-entry spring guide rod and bolt bracket can also be taken out as usual. At this time, the front guard/air pump can also be simply removed, because when lifting the shell cover, a small rod for positioning the air pump is pulled out at the same time, which is equivalent to pulling the small handle on the right side of the gauge base when disassembling the AK-74 rifle. The combination of weapons is in the reverse order of decomposition.