On the DVD audio commentary, Barsuglia reveals that the guns in Hauser's introductory scene are from Hauser's personal collection. At one point, after Hauser moved, he called Barsuglia, leaving the message, "I've got a problem. I don't know where my guns are."
Barsuglia has indicated that he modeled Zombie Farm after the Italian Western mold where there has to be action every ten minutes. However, he took it a step further and said, there has to blood every six minutes.