Top Gun Deals has raised the bar with this extraordinary shotgun that truly is one of a kind that was manufactured in a state-of-the-art facility. The innovative design and guaranteed functionality are well ahead of their time. Extreme detail has been a priority from conception through the production of these double-barrel repeater shotguns. DP-12-DP-12 Full Works Package For Sale. The first of its kind, a premium defense, double-barreled, pump, 12 gauge shotgun that quickly fires 16 rounds. Designed for the most discerning shooters who demand extreme firepower and require consistent reliability. The stock has a QR code you can scan with your smartphone or tablet to download the manual and other information. Please be sure and fill out the warranty card and send it to Standard Manufacturing.