Weihrauch HW99/50/57 MAXI Tuning Kit

All the benefits of a standard TbT kit, but custom fitted to the supplied Premium TbT Spring. Comes with fitted delrin spring guide with a top hat, slip washer and 2 preload washers. This kit also comes with Lithium based Molybdenum Disulphide grease and abrasive paper as well as instructions for fitting kit and piston sleeve.

This kit includes the longest spring that will fit the HW50/99, and due to slight variances gun to gun, a coil may need removing for it to work.

This may increase power, chrono required! Full instructions on spring shortening available in “Instructions”