The Springfield Armory® XDS 9mm Centerfire Pistol Essentials Kit features a single-action pistol with a 7-round (flush) or 8-round (extended) capacity. The 3.3" carbon-steel barrel has a Melonite finish and a 1 in 10" rate of twist. Polymer grip. USA Trigger System. Steel fiber-optic front sight and a low-profile combat rear sight.