Ruger SR9 9mm full-size striker-fired pistol with 4.14" barrel, adjustable 3-dot sights, and 17-round capacity. Used in good working condition with one magazine. Read more.
The Ruger SR9 is a full-size, striker-fired semi-automatic pistol chambered in 9mm, built for personal defense, duty use, and range shooting. Known for its slim profile and comfortable ergonomics, the SR9 was designed to offer strong capacity in a lightweight polymer-frame platform. Ruger describes the SR9 as one of its slimmest and most controllable 9mm pistols, with an adjustable 3-dot sight system, ambidextrous manual safety and magazine release, accessory rail, and a reversible backstrap.
This model typically features a 4.14-inch barrel, 17+1 capacity, glass-filled nylon frame, and stainless steel slide/barrel assembly depending on the configuration. The reversible backstrap allows the grip to be set flat or arched for a better fit, which helped make the SR9 popular with shooters who wanted a thinner full-size pistol. Current listings also show the standard SR9 using a 17-round magazine, matching your note that this one includes one 17-round mag.
A used Ruger SR9 in good working condition with one 17-round magazine is a solid budget-friendly 9mm option. Since this one appears to include only a single magazine and no box was mentioned, its value lands a bit below comparable examples that include a fuller factory package. That pricing adjustment is an inference based on published used-market averages and current retail listings.