In a market dominated by polymer-frame, double-stack, duty-size 9mm handguns, one of the most popular options out there is the Heckler & Koch VP9, which provides shooters with a few enhancements over other options on the market, such as its enhanced trigger. Practice makes perfect with these guns, though, and this 17-round, all-steel magazine provides an additional loaded mag for training and daily carry. Each HK VP9 steel magazine has a carbon-steel magazine body that's heat-treated and finished with a black-oxide treatment. This steel body provides the durability that today's handgun owners are looking for in a carry-ready magazine. Inside the HK VP9 steel magazine Mfg: Pro Mag