15 years approximately , the end of my career was vigorous and leisure time sporadic. It spent months at a time in the case in the closet, and when I pulled it out ultimately the battery was dead. I had an air arms 510 ex fac for about a year before it was stolen in a break in, bough it used ( another mistake ) with the insurance money.
Instead of a hammer it has a solenoid the trigger is extremely adjustable, believe it or not there is such a thing as too much" lite trigger" .
The power can be adjusted electronically as well , 15 power levels, but you have no idea what the difference between them is , so it can be very annoying especially when you are close to a good tune. AT least a spring is easy to replace and reasonably predictable.
It Sounds good, however long term is so much marketing hype and really just a bell and whistle. Great for marketing types to hype.
Last two years, trying to breath life into it again.