Review: SIG P320 XCompact 9mm With X-Ray Night Sights

SIG P320 XCompact handgun with the Foxtrot 1x weapon light attached

After many years in law enforcement, I developed a strong respect for SIG products. I was issued the SIG P226 at one time. I also carried the SIG P220 at times. While the SIG P320 XCompact came along well after my time as LEO, I am no less enthusiastic about reviewing or carrying it.

When the brass specifies the SIG as a service pistol, you know that they have not purchased the handgun on a low bid. SIG has attempted to produce budget guns as well. They are not cheap, but they cost less than the P226, as an example.

SIG P320 XCompact 9mm pistol left profile
The improved grip and redesigned slide make the XCompact a thoroughly modern handgun.

History of the SIG P320

The SIG P250 was introduced 15 years ago. The P250 is a hammer-fired double-action-only pistol with a polymer frame. The P250 is usually the least favorite SIG of SIG fans for some reason. However, in my case, I have the greatest respect for the P250 9mm.

I have a long serving P250C 9mm that is a front-line pistol for home defense. The pistol is simple enough — load, holster, draw, and fire. There is no decocker and only one trigger action to learn.

The P320 follows with this simplicity. The P250 did not do as well as SIG hoped for. The P320 was developed as a striker-fired version of the P250 pistol. The P320 has been successful for SIG and received critical acclaim for its short, crisp trigger action and reliability.

The pistol features a relatively low bore axis, a well-shaped grip frame, and good features such as excellent combat sights. The pistol features a light rail for mounting combat lights and lasers. I used the SIG Foxtrot combat light during the evaluation.  

The SIG P320 has been in service for more than seven years. The pistol features a modular construction that allows changing the grip frame for full size, compact, or subcompact grip frames. The serialized chassis is the ‘firearm.’

SIG P320 XCompact pistol with the slide locked to the rear with a box of ZQI ammunition
The SIG P320 XCompact proved reliable with a wide range of 9mm ammunition.

SIG P320 Features

The striker-fired SIG P320 offers good combat accuracy with less training time than a double-action pistol. The SIG P320 target versions have been successful in many types of competition. The pistol is a favorite among handgunners. However, there are also those who do not care for the pistol.

The trigger, that many find attractive and useful, doesn’t appeal to some shooting styles. Like most SIG pistols, the P320 features a Nitron-coated slide. The XSeries also features a slide cut for optics. Simply remove the plate, mount a SIG Romeo sight, and you are good to go. Well, a little more complicated than that but not difficult.

The 320 XCompact also features SIG’s new X-Ray night sights. The grip frame is smaller than the original and offers an excellent hand fit. The X Frame grip features a longer grip tang, often called a beavertail extension.

SIG P320 XCompact handgun field stripped
As is true will all of SIG’s P-Series handguns, field stripping and maintenance proved simple.

The grip is thinner and more aggressively finished than the original with an excellent balance of adhesion and abrasion. This makes for greater comfort and control when firing the pistol. The X Frame features an under-cut trigger guard to help raise the bore axis by using a high grip.

The overall design and engineering are impressive. I like the XCompact more than the original P320 by quite a margin. Many polymer frame pistols are slide heavy. SIG has gone to considerable effort to perfect the balance of this pistol. Interestingly, the pistol also features a modified magazine well that makes for excellent speed in reloading.

The most telling improvement to the pistol is the square-faced trigger. The trigger feels good and breaks sharply. I don’t feel the SIG P320 is a true double-action trigger, but SIG calls it a double-action.

When the trigger was pressed, the safety block moved, and the pistol’s striker broke. The trigger broke sharply at 5.5 pounds. There was more overtravel than I would have liked, but the reset was sharp. Firing rapidly wasn’t that difficult, but accurate rapid-fire was another matter.

SIG P320 XCompact pistol on a blue silhouette target
From the holster to sights on target, the P320 XCompact gave performance worthy of the SIG Sauer name.

Accuracy and Reliability

I fired the pistol extensively with a variety of ammunition. The pistol was drawn from a Galco paddle holster. Drawing and firing at man-sized targets at 7 and 10 yards, accuracy was excellent.

Most of the ammunition used was the Winchester Active Duty — a full-power loading. I punched out the X-ring of the targets with good results. I also fired a few rounds into the cranio-ocular cavity at a long 10 yards. None ventured out of the center of the outlined head.

Firing for absolute accuracy, I used the Winchester 124-grain +P. This is a strong load that breaks 1,200 fps. Accuracy was tested firing off a solid benchrest. I put five rounds into 2.5 inches at 15 yards. The SIG P320 XCompact gets a clean bill of health for accuracy, reliability, and handling.

Given the modularity, accuracy, and uncompromising reliability, the SIG P320 XCompact should certainly be high on the list of anyone looking for a new carry gun. If you have experience with the SIG P320, share your review in the comment section.

  • Winchester’s 124-grain +P cartridge beside an upset bullet
  • SIG P320 XCompact pistol on a blue silhouette target
  • SIG Sauer X-Ray3 day an d night sights
  • SIG P320 XCompact 9mm pistol left profile
  • SIG P320 XCompact handgun with the Foxtrot 1x weapon light attached
  • SIG P320 XCompact 9mm pistol right profile
  • SIG P320 XCompact handgun field stripped
  • SIG P320 XCompact pistol with the slide locked to the rear with a box of ZQI ammunition

About the Author:

Bob Campbell

Bob Campbell’s primary qualification is a lifelong love of firearms, writing, and scholarship. He holds a degree in Criminal Justice but is an autodidact in matters important to his readers. Campbell considers unarmed skills the first line of defense and the handgun the last resort. (He gets it honest- his uncle Jerry Campbell is in the Boxer’s Hall of Fame.)

Campbell has authored well over 6,000 articles columns and reviews and fourteen books for major publishers including Gun Digest, Skyhorse and Paladin Press. Campbell served as a peace officer and security professional and has made hundreds of arrests and been injured on the job more than once.

He has written curriculum on the university level, served as a lead missionary, and is desperately in love with Joyce. He is training his grandchildren not to be snowflakes. At an age when many are thinking of retirement, Bob is working a 60-hour week and awaits being taken up in a whirlwind many years in the future.

Published in
Black Belt Magazine
Combat Handguns
Rifle Magazine
Gun Digest
Gun World
Tactical World
SWAT Magazine
American Gunsmith
Gun Tests Magazine
Women and Guns
The Journal Voice of American Law Enforcement
Police Magazine
Law Enforcement Technology
The Firearms Instructor
Tactical World
Concealed Carry Magazine
Concealed Carry Handguns

Books published

Holsters for Combat and Concealed Carry
The 1911 Automatic Pistol
The Handgun in Personal Defense
The Illustrated Guide to Handgun Skills
The Hunter and the Hunted
The Gun Digest Book of Personal Defense
The Gun Digest Book of the 1911
The Gun Digest Book of the 1911 second edition
Dealing with the Great Ammunition Shortage
Commando Gunsmithing
The Ultimate Book of Gunfighting
Preppers Guide to Rifles
Preppers Guide to Shotguns
The Accurate Handgun
The Mission of Cheaper Than Dirt!'s blog, The Shooter's Log, is to provide information—not opinions—to our customers and the shooting community. We want you, our readers, to be able to make informed decisions. The information provided here does not represent the views of Cheaper Than Dirt!

1 Comment;

  1. Sig might be the most controversial manufacturer around. The P320 line up is right up there with all it’s glory and all it’s gloom. Personally, I have had both success and failures with my Sigs. However, my XCompact has been nearly flawless. 3,000 round. First 50 had 2 or 3 failures. After that, zero. I really loathe a firearm that requires a ‘break in’. But same thing happened on my 365’s and they too run flawless (now).

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