It's not regulated. It's basically a bullboss with a bottle and wood stock. No review but Jim Chapman has a video of him hunting iguanas in PR earlier this year.
thanks blackdiesel I just bought the refurb bullboss from Hatsan USA for $349 and that sucker hits hard at 1050fps I'm tinkering with the hammer to get it below 900fps
Just purchase one and will be here soon, I'll have a review and video on it and any mods I will be doing with it!!! like to install a regulator, carbon bottle in the future...