The black 98 Custom Power Pack is all about you. This marker allows you to call the shots because it?s the most customizable marker on the market. And it's easy. All of the Tippmann accessories can be installed with the same tools that you use to take the marker apart. The 98 Custom has the ability to accept the Flatline Barrel System, Sniper barrels, double trigger kit, the Response Trigger System, collapsible stock, drop forward, rear-cocking system, vertical adapter kit, vertical and expansion chamber kit and the low pressure system. The 98 Custom Power Pack also includes a 9-ounce CO2 tank, butt plate and a high-performance goggle with anti-fog lens. With its all aluminum die cast receiver and new, extra-sturdy finish, the semi-automatic 98 Custom Power Pack also features a quick-release feeder elbow, removable front grip to accept expansion chamber and vertical kits, and a 200-round hopper. It's fully compatible for CO2, compressed air, or nitrogen.