Sorry gentlemen, but I think that this is another Hesse / Vulcan spinoff. Take a look at these two auctions:
This is for a Vulcan: http://www.gunbroker.com/Auction/ViewItem.asp?Item=59602260
This is for a Blackthorne: http://www.gunbroker.com/Auction/ViewItem.asp?Item=59747594
Both are from the same location, INVER GROVE HEIGHTS, MN 55076 and notice the blue tarp background?
Also, here is the address for Vulcan Armament:
Vulcan Arms, Inc.
P.O. Box 2473
S. St. Paul, MN 55076-8473
Here is the address for Blackthorne Products:
Blackthorne Products LLC
PO Box 2441
South Saint Paul, MN 55076
Both are located in the same post office.