An antimatter weapon is a type of weapon that uses a special type of matter that is the opposite of normal matter. Normal matter, which is what we are made of and what makes up everything around us, is made of particles called protons and neutrons. Antimatter is made of special particles called antiprotons and antineutrons. When normal matter and antimatter come together, they interact with each other and create a burst of energy that is much larger than normal. This makes antimatter a very powerful type of weapon, because even a small amount of antimatter could create a lot of destruction if it interacts with normal matter.