...are still running strong 10 years and thousands of pellets later. I just recently replaced an airtube seal on one for my brother. That was the only thing that went bad so far. So far I have a .25 Hatsan Gladius, 2 .22 Hatsan Jet2, a .22 Hatsan Velox, a .22 Stoeger Bullshark, and a .25 Barra 250z.