One of the best values in an out-of-the-box ready package for all of your carry, range time, and home defense needs. The Tisas PX9IO 9mm pistol is incredibly accurate and reliable and the quality is unparalleled matching that of many pistols priced much, much higher. You can pay more, but you would be hard-pressed to get more. Just look at all of these features. Front Sight (Glock Style), Drift Serrated Adjustable Rear Sight (Glock Style), Tenifer Treatment applied to protect from corrosion and wear, Picatinny Rail built into the frame, Tactical Trigger with Trigger Safety, Ambidextrous Thumb Safety. The pistol comes complete with 1-18 round mag and 1-20 round magazine. Also Includes a loader, holster, owner\'s manual and pin remover/ Allen tools, cleaning brush, and rod. The IO in the description stands for Iron Only referring to the sights and meaning that this pistol does not have an optics plate or an optic attachment point on the slide. It does however have a Picatinny Rail molded into the polymer frame. See more specs below.