The TbT range of air rifle tuning kits offer an extensive range of options for all the most popular air rifles with great value for money.

The TbT Maxi range of kits comprise of a choice of UK or Full power TbT Premium spring with matching, fitted guides. This isolates the spring from any metal contact, reducing spring twang, vibration and recoil at a stroke.
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 German spec TbT Maxi Pro is available for this model, these are designed primarily for the German and Italian market and allow the gun to run better at a lower power (sub 6 ft/lb, 7.5j) with reduced hold sensitivity. Also ideal for UK Bell Target competition.
The kit comprises of the the TbT Maxi kit with the addition of a pot of Bum-Slide hi moly paste, and a short stroke extension. The short stroke extension fits onto the front of the piston reducing the volume of air being pushed out on firing. This allows the piston to travel faster, over a shorter distance for the same power. Lock time is dramatically reduced along with recoil and hold sensitivity. It is a simple modification that takes less time to fit than it took you to read this.

Short stroke extensions are also available separately.

Please use a chrono every time you rebuild your air rifle, with all TbT kits the spring may require shortening to stay legal in some countries.