A paintball marker is a device used in the sport of paintball to shoot small, round capsules filled with paint. These markers use compressed air or CO2 to propel the paintballs at high speeds. They come in various styles, including mechanical and electronic, each offering different features and performance levels. Paintball markers are designed for safety and accuracy, with many models equipped with adjustable settings for velocity and firing modes. Players can customize their markers with accessories like scopes, grips, and barrels to enhance their gameplay experience. Proper maintenance is essential to ensure optimal performance and longevity.