The SIG P320 XTEN – SIG Embraces the 10mm (again)

SIG and the 10mm don’t have much of a relationship. Sure, years ago, they tossed us a bone with the P220 in 10mm a few years back, but it’s been a caliber that’s largely ignored by this Total Systems provider. So it was quite a surprise to see the P320-XTEN. Of course, the XTEN isn’t a P320 with a 10-inch barrel but a 10mm P320 model.

The P320-XTEN goes big with the X-Series grip module and wisely makes the gun optics ready. With the flat nature of the 10mm, the gun will certainly benefit from the extra range and flat shooting nature of the 10mm. A skilled shooter won’t have any issues hitting targets out to 50 yards with such a handgun, add in the X-Series trigger and a 5-inch bull barrel, and you have an accurate, hard-hitting pistol.

Here it is directly from the mouth of SIG Sauer.

Introducing the SIG P320-XTEN

“The P320-XTEN is the most powerful P320 SIG has ever built combining the features of our XSERIES models with the punch of the 10mm round. The superiority of this pistol begins with the all new XSERIES grip module, designed specifically for 10mm and 45 AUTO calibers, featuring the XSERIES deep trigger undercut, extended beavertail, and aggressive stippling for a high grip making recoil easier to manage,” began Tom Taylor, Chief Marketing Officer and Executive Vice President Commercial Sales, SIG SAUER, Inc. “Another premium feature of the P320 XTEN is the 5” bull barrel. The additional mass and weight of the barrel absorbs the power of the round lowering recoil and providing exceptional accuracy shot after shot for the premium performance you expect from a P320 and an XESRIES model to become the P320-XTEN.”

The SIG SAUER P320-XTEN is a 10mm, striker-fired pistol featuring a polymer XSERIES 10mm / 45 AUTO grip module, a 5” Bull Barrel, flat XSERIES trigger with a 90-degree break, Nitron finished stainless steel optics ready slide compatible with a ROMEO2 and RMR optic with front and rear serrations, and XRAY3 Day/Night sights. The P320-XTEN ships with (2) 15round steel magazines and is optimized for use with the SIG SAUER Electro-Optics ROMEO2 open reflex red dot sight.


Caliber: 10mm
Overall length: 8.5 inches
Overall height: 5.6 Inches
Overall width: 1.3 inches
Barrel length: 5 inches
Sight Radius: 6.8 inches
Weight (w/magazine): 33 oz.

The SIG SAUER P320-XTEN is now shipping and available at retailers. To learn more about the SIG SAUER P320-XTEN or to watch the product video with visit

Travis Pike
Travis Pike is a former Marine Machine gunner who served with 2nd Bn 2nd Marines for 5 years. He deployed in 2009 to Afghanistan and again in 2011 with the 22nd MEU(SOC) during a record setting 11 months at sea. He’s trained with the Romanian Army, the Spanish Marines, the Emirate Marines and the Afghan National Army. He serves as an NRA certified pistol instructor and teaches concealed carry classes.