Sig Sauer 320X59LEGIONR2 P320 9mm Luger Double 5" 17+1 Gray Polymer Grip/Frame Legion Gray Stainless Steel Slide. The P320 X-Series has an enhanced X grip module with extended beavertail, 4-sided beveled magwell, and a crisp trigger guard undercut. It also has a M1913 Picatinny rail. This model features Dawson Precision fiber optic front and adjustable rear sights.