Domestic M99 new 12.7mm large caliber sniper rifle has compact and reliable structure. The gun barrel adopts the special rifling of type 85 12.7mm anti-aircraft gun barrel, which has been optimized and has the characteristics of good wear resistance and ablation resistance. The designer also improved other parts one by one, such as optimizing the supporting position of the tripod assembly and the overall size of the magazine, making the whole gun structure more compact and reliable. Using new materials and new technology to reduce the weight of the whole gun is one of the key and difficult points to be overcome in the design of light weapons at present. In the process of tackling the key problem of M99, the designer carefully analyzed the stress of each component, and constantly tried lighter and higher strength materials and advanced manufacturing technology, so that the performance of components made of new materials increased instead of decreasing, and the weight dropped sharply. For example, the shell is made of aviation aluminum alloy, and the inner and outer surfaces are anodized and electrostatic sprayed, which has good wear resistance and ablation resistance. The tail of the gun adopts aluminum alloy to seal the tail end of the shell to withstand the impact when the gun is seated. The test results show that the performance of M99 is more outstanding after these improvement measures are taken, which can be compared with similar weapons in the world. In March, 2005, M99 tested the accuracy of 1 0,500m at the national shooting range. The results show that its tactical indicators such as accuracy and 3000 rounds life of the whole gun meet the requirements of the national military standard. Compared with similar weapons, high precision is the biggest highlight of M99. The whole gun has light weight, small recoil, adjustable shoulder and cheek height and adjustable tail support height. It cooperates with biped to support the weight of the whole gun, thus improving the stability and shooting accuracy of the whole gun. Coupled with the advanced white light sight, the shooting accuracy of the whole gun is greatly improved. At 100 m, the density of Rso(50% bullet distribution range) of M99 is less than 2.2 cm, which is at the same level as that of M82 in the United States. When the wind speed is 4m/s, use M99 to shoot at the target at 1000m, and you can make a circle with a radius of 0.5m; The target at 1500m can make a circle with a radius of 2.5m; Shooting at 2500 meters can hit a circle with a radius of 5 meters. The powerful 12.7 mm bullet has strong penetrating power, which can directly penetrate the bunker and hit the personnel target, making the personnel lose their combat effectiveness. Because the barrel adopts special rifling, it can be used with various 12.7mm bullets such as armor piercing, burning, explosion and precision bullets. And equipped with white light aiming; When used together, the mirror has the characteristics of long range, high precision, strong armor-piercing ability and outstanding terminal effect, and can easily attack various targets on the battlefield. If an armor-piercing incendiary bomb is used, a steel plate with a thickness of 15 mm can be penetrated at an angle of 90 at a distance of 500 meters. The homogeneous steel plate with a thickness of 10 mm can be penetrated at an angle of 30 and a distance of 800 meters from the target by using the armor-piercing explosive incendiary bomb. When explosives and incendiary bombs are used, the steel plate with a thickness of 1.8mm can be broken down at 300m and then exploded, resulting in more than 18 fragments, and combustible substances can also be ignited. The recoil is small. This gun is ingenious in reducing recoil. The well-developed efficient muzzle brake reduces most of the recoil force during shooting, and the effective braking force rate is as high as 80%. Semi-automatic structure makes part of recoil energy released in the process of recoil of bolt and bolt holder and compression of recoil spring and buffer spring. Biped animals also absorb some recoil energy. There is also a rubber pad at the tail of the shoulder rest, which also plays a role in reducing recoil. These measures make the reasonable recoil of M99 similar to that of 12 shotgun. The highly reliable gun adopts mature and reliable technologies from the working principle to the scheme structure, such as the automatic principle of air conduction, semi-automatic firing mode, rigid locking mechanism of nose rotation, transmitter with double insurance, etc. These fully ensure the smooth supply of all ammunition, reliable operation of automaton, few faults and high safety. Whether marching, shooting or maintenance, it can make operators feel safe and economical. Looking at the appearance of M99, it seems to be related to AS50 of British AI company. However, if we compare them carefully, we will find that M99 and AS50 are only partially similar, but the actual appearance is obviously different, and the internal structure is even more different, such as using different locking mechanisms. The shell of M99 looks thicker than that of AS50, but in weight, M99 is 2kg lighter. M99 and AS50 are related, and both of them are good at simple structure, strong versatility, easy processing and low production cost. Some performances of M99 even exceed those of famous foreign large-caliber sniper rifles. For example, M82A 1 sniper rifle cannot adjust the height of shoulder rest, tripod and cheek plate. Moreover, there are many moving parts (barrel recoil type) when launching, and the accuracy is not ideal. After launching, it will arouse a lot of dust around the shooter, which will easily expose the position and affect the aim of the next shooting. Of course, the M99 12.7mm semi-automatic sniper rifle also has some shortcomings, such as the size of the whole rifle is slightly longer and it cannot be folded and carried. The weight needs to be reduced. Other photos:/70cfyingkgqfm2e88ium _ a/baike/pic/item/9319cf094af0498d1581b1a.jpg shot in Las Vegas in February 2006. This .416 bullet is a miniature version of the 50 BMG bullet. This caliber is not designed to provide a long-range sniper bullet with less recoil, but is only developed for areas where civilians are not allowed to own.50 rifles (such as California). Caliber 50bmg.50bmg.465438+ 06 The barrel length is 737mm (29 ") 635mm (25") 813mm (32 "), and the total length is1194mm (47")/kl. 00.4 kg (23 lbs) 9. 1 kg (20 lbs) 1 1.36 kg (25 lbs) The following picture shows Vattre M99.

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