I was fondling a few of them a couple of weeks back - I put a post up on here about them so a quick search will reveal a few bits of info.
They're made from blued steel instead of dipped Titanium and run a very efficient valve setup, which gives loads of shots per charge (e.g. around 65 in .177 from the 18" carbine actions - so the 25" .22 will give around 140).
Prices are tremendous too.
Hope this helps - Craig