Since Russia began to use suicide drones to attack Ukraine's rear infrastructure in October, how to curb these large numbers of low-cost drones has become a problem for Ukraine, the United States and Europe. The US Defense News said on November 24 that anti-aircraft machine guns appeared in the latest batch of US military assistance to Ukraine. This seemingly outdated weapon is being used by the West as a new way to fight against suicide drones. According to the report, according to the statement issued by the U.S. Department of Defense on the 23rd, the latest batch of US $400 million worth of security assistance provided by the United States to Ukraine includes 150 anti-aircraft machine guns with thermal imaging sights and the National Advanced Surface to Air Missile System (NASAMS), in addition to such advanced weapons as the "Haima" rocket system, the "Ham" anti radiation missile and 155 mm precision guided shells. The Pentagon said: "With Russia's missile and drone attacks on Ukraine's key energy infrastructure, increasing Ukraine's air defense capability remains a top priority. NASAMS and anti-aircraft machine guns will help Ukraine deal with these urgent threats." The US Business Insider website also noted on the 24th that Ukraine and the US and Europe both use anti-aircraft guns and anti-aircraft machine guns as a new way to fight against Russian drones. The report mentioned that during World War I and World War II, anti-aircraft guns and anti-aircraft machine guns were the main means to counter air threats. However, in the 1950s, high-speed high-altitude jet aircraft appeared. They could fly supersonic at tens of thousands of meters, exceeding the attack range of anti-aircraft guns and anti-aircraft machine guns, which gradually replaced them by anti-aircraft missiles. Both the West and Russia have stopped developing new anti-aircraft guns or anti-aircraft machine guns. But now Russia is attacking Ukraine's infrastructure with wave after wave of suicide drones. The Ukrainian army wants to use large and expensive surface to air missiles to stop these low-cost low technology drones, just like hitting mosquitoes with anti-aircraft guns. Therefore, when intercepting relatively slow and low flying UAVs, anti-aircraft guns and anti-aircraft machine guns are again favored. Nick Reynolds, a military expert at the Royal Institute of the Armed Forces, a British think tank, said in an interview: "Anti aircraft guns have been ignored for years, but they should never be forgotten." In his research report on air defense operations in the Russian Ukrainian conflict, Reynolds analyzed what weapons Ukraine needs to counter the suicide drones that Russia uses in large numbers, and urged the West to provide more self-propelled anti-aircraft guns to Ukraine. "In such a special environment, anti-aircraft guns deserve more attention than missiles. Whether large air defense systems or shoulder mounted air defense missiles, their costs for each engagement are much higher than anti-aircraft guns. Limited by the number of ammunition, there is also a gap in the ability to continue operations." However, the report acknowledged that at present, the number of anti-aircraft guns and anti-aircraft machine guns that the West can provide is limited, and only Germany has provided a few "cheetah" self-propelled anti-aircraft guns. Ukraine had to use self refitted machine guns to carry out air interception missions. Some western defense experts suggested that the United States should support the M163 Vulcan self-propelled anti-aircraft vehicle in the 1960s. It was loaded with 20mm Vulcan rapid fire guns on the M113 armored personnel carrier, which could