Tin Bum Tuning Drop In Kit for the Spring Powered Air Arms Pro Sport and TX200 Series of Underlever Air Rifles.

The TbT Standard guide set will work with your existing spring to reduce spring twang, vibration and recoil at a stroke. Guides that fit the spring properly keep it under control during the firing cycle prevent it from rattling around, all metal to metal contact is eliminated. The kit includes a rear guide, top hat and slip washer to reduce torsional recoil, preload washers to allow some control over power output, standard molybdenum grease and a TbT sticker for your rifle. With the addition of a small amount of optional Bum-Slide hi moly paste, this will give you many thousands of quiet, maintenance free shots between services.

This Tuning Kit comprises of a delrin spring guide with a long 2 part 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 the drop in kit.

The kit is to fit the shown internal diameter spring size, the mark number is an indicator, not a guarantee. Please measure before ordering.

14mm & 14.45mm Mk2 / North American / FAC versions are also available