What are the advantages and disadvantages of FN2000 modular system?

Belgian FN Hersta North America Branch FN2000 F2000 5.56mm Individual Assault Weapon At the 5th Abu Dhabi International Defence Exhibition in March 2006, Belgian FN Company launched the F2000 modular assault rifle and exhibited its basic gun, grenade launcher and FCS prototype. Its smooth modeling, especially the harmony and unity of the Grenade launcher and the whole system, attracted a lot of attention at the exhibition. Foundation-The foundation of the 5.56mm bareback rifle F2000 modular assault weapon system is a compact 5.56mm bareback rifle. The gun has a caliber of 5.56 mm, a length of 694 mm, a barrel length of 400 mm and a theoretical firing rate of 850 rounds per minute. The automatic mode is air-guided, and the bolt is used to rotate and lock. The empty magazine weighs 3.5 kilograms. Can hang 40mm Grenade launcher, weighing 1kg. The optical sight with the scope of 1.6 times can make the target image clear even in dark weather. The pull handle is arranged on the left side of the shell. The rifle uses a lot of composite materials, and its appearance is smooth and smooth. The optical collimator is installed on the MIL-STD-1913 Picatinny track. The outer cover is a molded frame with notches and columnar collimator in the frame. The standard M 16 30 magazine is supplied with ammunition, which is very convenient to assemble and disassemble. The gun also combines the characteristics of FN's previous products, such as the trigger deceleration motive, which is taken from the 5.7mm P90 individual self-defense weapon. At the same time, P90 shell throwing mechanism is adopted. Unlike most shell-throwing grooves on the side, the F2000 throws the shells forward to the right of the muzzle through the shell-throwing window behind the gun bore. In order to ensure that the shell is thrown forward, after it is pulled out, it should be sent to a shell throwing tube that leaves the barrel. This is achieved by a unique rocker on the nose. When the cartridge case is pulled out, the rocker tilts, lifting the cartridge case away from the barrel axis, making way for the ammunition supply route and supplying the next bullet at the same time. When new ammunition enters the chamber, the shell casing is sent to the shell throwing tube. Only when the number of shells in the shell-throwing tube exceeds 3 or 4 rounds, the first shell that enters the shell-throwing tube is thrown forward from the rifle. In other words, in fact, in the process of the first short shot, no shell casings were thrown. If necessary, you can directly see the chamber by turning the knob behind the observation frame. Fusion-gun-mounted Grenade launchers, whether M203 in the United States or BG- 15 in the Soviet Union, can feel that they are just an accessory of rifles when they are combined with rifles. Replacing F2000 with a 40mm low-speed Grenade launcher designed and produced by FN Company is not only a whole in appearance, but also the center of gravity of the whole system remains near the trigger after the magazine is full, which is very difficult. The combination of the launcher and the rifle is simple, and the pump gun is used, and the trigger is located below the trigger of the rifle. Not only the 40mm grenade launcher is designed as a part of F2000, but also a simple and feasible fire control system (FCS) is designed for the grenade launcher. Its installation only needs to remove the optical sight and frame seat on Picatinny track and replace it with FCS. When used for rifle aiming, FCS has a general effect, and its outstanding performance lies in accurately calculating and displaying the distance of Grenade target. Aim at the target, press a button below the trigger and start the low-intensity laser rangefinder. Distance parameters accurate to 1 m will be displayed in the sight, and a red dot will appear at the same time. Raise the muzzle and correct the shooting angle. When the shooting angle is just right, the red dot will turn into a green dot. If the shooter wants to fire a Grenade by clamping, the top slot of FCS will have three red/green dots. Considering the influence of wind on the range, there is also an increase/decrease distance correction button at the top of the frame. Because the distance is not estimated, but accurately calculated, the probability of Grenade destroying the target is greatly improved. ...