I've read on the user web board a lot of complaints about the plastic construction. And the ammo is a pain [$$, components are not easily available]. It needs to be re-chambered to a suitable wildcat, and made in decent steel.
Just took a quick look on Gunbroker.com, there is a posting for 1000 rounds of the 5.7 x 28 with a "Buy Now" price of $500!