Sig Sauer P320 XTEN10mm Auto (ACP) 5in Nitride Black Pistol - 15+1 Rounds - brings all of the features of the XSeries into a carry style handgun in 10mm for shooters and hunters looking for performance to the power of 10. The P320-XTEN comes standard with a 5in bull barrel, Xray3 day/night sights, and an XSeries optic-ready slide with front and rear serrations. For those looking for even more precision, every P320-XTEN is optic ready and compatible with the SIG SAUER ROMEO2 reflex optic which is designed to withstand the abuse the 10mm cartridge delivers. To reduce the recoil, a completely redesigned XSeries polymer grip module provides a strong purchase and stippled finish and makes shooting comfortable for any type of round. Each P320-XTEN comes standard with two 15-rd magazines. The new SIG P320-XTEN takes performance to the power of 10. Optic Ready Slide compatible with Romeo2 and Trijicon RMR 5in Bull Barrel All-new XSeries 10mm/45 Auto Grip Module Flat XSeries trigger with 90-degree break XRAY 3 Day/Night Sights (2) 15rd Steel Magazines Browse all Sig Sauer 10mm Pistols.