What gun is the most powerful and the most accurate now? Please, everyone, thank you.

Barrett Barrett M82a1 and M2 In the upsurge of large-caliber sniper rifles, various weapons manufacturers, large and small, have launched various types of sniper rifles with a caliber of .5 or even larger, but the sniper rifles of Barrett Firearms Manufacturing Co., Ltd. are in a near monopoly market position. Ronnie Ronnie Barrett was originally a commercial photographer in Tennessee, USA, and never received any training in firearms design. In January 1981, an accidental opportunity prompted Barrett to design a large-caliber semi-automatic sniper rifle. So, from design to manufacture, he took out a sample gun in less than a year. Then Barrett founded his own company, and began trial production in 1982, and the M82A1 large-caliber semi-automatic sniper rifle was officially "born". At that time, Barrett's sniper rifle was mainly aimed at the private market, and its military application was not paid enough attention. Although in 1983, the US Navy purchased 1 RAI5 s, it did not trust semi-automatic sniper rifles. By the mid-198s, Barrett had demonstrated the precision and power of M82A1 in Quantico. Although it failed to arouse much interest of the Marine Corps, Barrett remembered the military requirements and made improvements. On the eve of the Gulf War, senior officers of the Marine Corps discussed the equipment of infantry weapons for long-distance desert operations. Obviously, the M16 rifle is far from meeting the requirements. Although someone proposed to reuse the 7.62mm caliber M14 rifle with a longer effective range, it was only a stopgap measure. Finally, Lieutenant General E.T. Cook decided to equip the Marine Corps with a rifle with a longer range and greater power. In 199, Barrett Company manufactured a .5 caliber military sniper rifle that met the requirements of the military. In October of the same year, the Marine Corps selected M82A1 as a long-range killing weapon, which was used to deal with long-range individual soldiers, bunkers, vehicles, equipment, radar and low-altitude and low-speed aircraft and other high-value targets. The explosive material disposal team also used M82A1 to mine. Barrett completed the order contract for 1 rifles within 9 days after receiving the order. At the same time, the US Army is also looking for a .5 caliber heavy sniper rifle. At first, the army also chose some rifles with rotating rear-pull bolt for experiments, because the rifles with rotating rear-pull bolt have better accuracy than semi-automatic rifles. The researchers found it unsatisfactory after experiments, so they began to look for candidate models that can be automatically filled in the market. Finally, they chose Barrett M82A1 which was being used by the Marine Corps and bought 1 pieces. People in the army think that if other government agencies are already buying and using certain products, it will be more economical for them to follow suit. Subsequently, the US Air Force also purchased 35, and together with the Special Operations Command, the US military used more than 3 M82A1 in the Gulf War, and performed well. In December 199, the British Ministry of Defence also purchased a small amount of M82A1 for its explosive material disposal team. At the same time, according to the British suggestion, Barrett changed the original 11 magazines to 1 magazines to avoid the magazines hitting the ground when shooting in the prone position. After the Gulf War, the large-caliber sniper rifle attracted the attention of the armies of various countries, and at the same time, it set off a lasting upsurge in the development of large-caliber sniper rifles among the manufacturers of light weapons in the world. Barrett also developed a series of sniper rifles according to different requirements, most of which fired .5 BMG bullets. At the same time, we have also developed some related products, such as racks, gun bags and so on. M82a1 sniper rifle, also known as Barrett, has the reputation of "king of heavy sniper" in the international arms industry. The total length is 1,448 mm, the caliber is 12.7 mm, the gun weighs 12.9 kg, and the maximum range is 1,83 meters (at present, the effective range has been increased to 2,5 yards, that is, about 2,3 meters), and the price is more than 3.2 million Taiwan dollars (about 8, yuan). The price of each bullet is 8 yuan Taiwan dollars (about 2 yuan yuan). Each set of M82A1 sniper rifle includes special sniper mirror, M33 standard bullet and M8 armor-piercing bullet. Compared with ordinary sniper rifle, M82a1 has two advantages: First, it has strong lethality. It can not only shoot people, but also destroy high-value targets such as light armored vehicles, radars, ammunition yards and airplanes. The US Marine Corps used Barrett to destroy Iraqi artillery command vehicles and armored personnel carriers. Second, the range is long. The gun has a range of up to 2 kilometers, and bullets can easily penetrate the armor of armored vehicles 1 kilometer away. In the sniper confrontation, the range of the gun becomes a key factor to decide the outcome and even life and death.