Introducing the TTI INFINITY CNC Aluminum G-Series TDC Hop-Up Chamber - the ultimate enhancement for your Marui TM G17 Gen4. Crafted through precise CNC machining from high-quality aluminum, this hop-up chamber promises superior durability and reliability. Its innovative one-piece design ensures unparalleled stability, while the advanced top dead center (TDC) adjustment system delivers remarkable improvements in accuracy and range. Available in sleek black and striking blue, this hop-up chamber is the perfect upgrade for any airsoft enthusiast looking to elevate their pistol's performance. Don't compromise on precision; choose TTI INFINITY to experience the best.