The Tin Bum Tuning PRO Short Stroke Drop In Kit for the Spring Powered Weihrauch HW77 and HW97 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.

The TbT PRO Kit for the 26mm piston HW97/77 gives you everything you need to transform your rifle’s performance in one, cost effective package!

The Pro Kit contains; TbT Drop-in kit (spring guide with a top hat, slip washer and 2 preload washers), Short-Stroke extension and Bum-Slide lubricant as well as instructions for fitting the PRO drop in kit.