The Staccato P Optics Ready 9mm pistol is a double stack version of the best selling single stack 2011 Stacatto C. Coming with the "DPO" Optic cut and longer more accurate 4.4 inch barrel. Sporting improved serrations and fiber optics sights, this 2011 Professional pistol defiantly puts the p in professional. Also the P is equipped with double stack magazine vs a single stack mag that is found on the Staccato C. Flush Cut DLC Stainless Steel Barrel with 11 degree Crown is standard.