This just looks like an SBS version of the one SOG is selling for like $300. If you really want one, buy theirs and shop the barrel yourself. However, in the configuration that is shown at that url, I don't see why they don't just register it as an AOW vs. and SBS (no stock...) that way the transfer tax is only $5 vs. $200. The tax for making an AOW is still $200, though.
Actually, I believe I know why it isn't registered as an AOW - they need to have started with a pistol or virigin receiver that never had a stock mounted. Since these were likely the same ones SOG got (just modified by this company), they were imported with the stocks attached.
Anywho, I've only seen a couple of reports - most indicating it is garbage. Apparently, the pump action requires you to first push forward and then push back to eject the spent shell.
Rocko