The Dart Zone Pro-Max Pentavictus PCAR is a rifling attachment designed by Thanh to increase accuracy by adding true rotation to your darts as they exit the barrel. No internal modification is required! Just friction fit in place of the stock decorative muzzle piece!  Luke initially brought Thanh on to design these barrels for the Adventure Force Nexus Pro, as he has extensive springer and SCAR experience. Since then, these have been verified to be compatible with many other "Pro" or "Max" series blasters manufactured by Dart Zone and even the X-Shot Pro Longshot!  FEATURES:• Pro-Max Pentavictus PCAR• Designed and licensed by Thanh• Designed for the Adventure Force Nexus Pro• Compatible with Pro-level springers like the Nexus Pro X*• Slide in place and install or remove in a second!• 5-10 FPS performance loss with an increase in accuracy *Some blasters have a different fit than others, depending on tolerances. You may need sandpaper or tape to adjust the fit to your blaster. INCLUDES:• 1 Pro-Max PCAR in the style and color of your choice SPECS:• Twist Angle: 15-Degree• Twist Rate: Standard• Lines: 5• Material: 3D-Printed PLA Plastic• Weight: .3oz • Dimensions:      Length: 70mm     Diameter: 19mm LINKS: • Nexus Pro Mod Parts• More Pro-Max Barrel Attachments