On November 7th I bought a brand new DiamondBack DB9. On November 11th it suffered catastrophic failure after 49 rounds of Federal American Eagle 115 grain and 5 rounds of Hornady Zombie Max 115 grain. The failure that I experienced was that my rear frame rail completely separated from its mounts. The entire assembly snapped in half. I made two calls to customer service and found the staff to be unfamiliar with the product and I felt like I was having a script read to me. Both representative used the same phrase to dismiss my questions and concerns about the product. I sent an e-mail to Diamondback and expressed my displeasure and have received no response.

Edit: Photos taken with a stapler: http://imgur.com/a/bQzSo

tldr; DiamondBack Firearms makes and unreliable product and has terrible customer service