The XM307 is an ACSW Advanced Heavy Machine Gun:
The XM307 ACSW Advanced Heavy Machine Gun, developed for the United States Army, can just fire around 250 rounds per minute.
This gun, called one of the most advanced Crew Served Weapon (ACWS) is designed to allow two people to use it. Its range is terrifying that is 200 meters. It has been called the heavy machine gun due to the fact that it is capable of completely destroying anything in the 1000m range.
It could destroy large machinery that includes watercrafts, helicopters and even helicopters as well as watercrafts, all within the 1000-2000m range.
Without doubt, it’s certainly one of the most lethal weapons to be seen on the earth, and was created by humans.