This regulator has the "HAYMKR500" laser engraving, but has the ALL-NEW TKO internals. The TKO regulator is the latest evolution of the PowerHouse regulator family. The TKO brings forward the ability to have the user simply change the PowerPuck sealing element without the need to change the piston. What this means is a typical rebuild would only require changing the PowerPuck, clean and lube the reg until the next service interval. From the beginning we have been developing regulators that are of the highest quality and that are lab and field tested by some of the best teams and players in the world. PowerHouse quality, service and support is what today’s tournament player expects and we do our very best to meet our customers’ expectations. We would like to take this opportunity to thank all of the people who have supported us on our mission in the industry we love! FEATURES AND BENEFITS: Pressure Adjustment Insert allows adjustment from 400 psi to 700 psi with a simple internal adjustment. This allows for a total of 300 psi adjustment. An industry first for a tank regulator! Improved sealing technology with our NEW PowerPuck System. Electropolished stainless steel ASA threaded Cartridge. Wave Spring Technology, precision woven flat wire spring for improved consistency and reliability to get back to setpoint pressure fast. Dedicated setscrew pockets to prevent galling and slipping in your guns ASA threads. Low Profile Burst Disks for a smooth clean look. Dedicated Direct to Tank fill port, eliminates piston Jet damage and over pressurizing from rapid filling, at fill stations. Interlocking parts to prevent incorrect assembly. Quick disassembly for easy servicing. Custom Pressures available please email us your desired pressure and we will build it. All PowerHouse regulators are Dyno Tested before and after completing a 24 hour pressure test. User friendly puck replacement.