The Walther PDP Micro Compensator is built to provide the best possible shooting experience for your duty/EDC Walther PDP. The Walther PDP micro compensator adds properties that will give you much better groupings at longer ranges, improved target re-acquisition and superior recoil reduction. The PDP micro compensator reduces the vertical recoil by a whopping 30-35%! It also stabilizes the horizontal recoil for a much more predictable recoil pattern. We have built this compensator to last but also to be lightweight, and they were able to achieve this with machined aero-grade 7075 aluminum. Specifications for Herrington Arms HCPDP Micro Pistol Compensator For Walther PDP: Manufacturer: Herrington Arms Cartridge: 9mm Luger Finish: Aluminum Fabric/Material: 6061 Aluminum Threads per Inch: 1/2x28 Gun Make: Walther Gun Model: Walther PDP Condition: New Features of Herrington Arms HCPDP Micro Pistol Compensator For Walther PDP PDP Micro Compensator passed their 4000-round testing sequence without any issues! Reduces vertical recoil by up to 35% and stabilizes the horizontal recoil for a superior shooting experience! Works with all Walther PDPs seamlessly, whether its PDP Compact or PDP Full-Size 5 and the PDP SD PRO. REQUIRES A 1/2-28 THREADED BARREL DOES NOT WORK WITH KKM OR BARSTO BARRELS! THEY RECCOMEND USING THE SPRING THAT CAME WITH THE GUN. THEY RECCOMEND SURPASSING THE 500 ROUND BREAK IN BEFORE INSTALLING THE COMP! Package Contents: Herrington Arms HCPDP Micro Pistol Compensator For Walther PDP