An advanced gun system (AGS) is like a really big and powerful cannon that is used on big navy ships. It can fire very heavy bullets, called projectiles, that can travel super far and hit targets on land or in the water. The gun is controlled by special computers and sensors that help the sailors aim and fire it accurately. The projectiles are so big and heavy that they need a special machine to help lift them up and put them in the gun. Overall, the AGS is a really cool and powerful tool that helps the navy protect our country and keep us safe.