Test: SIG Sauer P320 X-Five, the flagship

SIG Sauer describes it as the “flagship of the 320 X-Series and the pinnacle for competition or every-day range use right out of the box”, “the only P320 with adjustable sight, perfectly suited for professional sportshooters” and “the most sportive variant of all pistols of he well-known and rewarded P320-family”. Based on the US Army duty pistol, the SIG Sauer P320/P320 Compact, the  P320 X-Five is indeed all this and even more: a modern polymer frame striker-fired pistol, it belongs to the X-Series line of modular competition guns that also includes the P226 X-Five. 

Zivile Version der SIG Sauer P320-M17
The new SIG Sauer P320-M17 is the civilian version of the US Army service pistol.

The modularity of the P320 X-Five means that besides the dedicated accessories (such as triggers, compensators, jet funnels, etc.) it can be easily equipped with other frame grip modules in three sizes are available: full-size, compact and sub-compact.

The “Five” in the name refers to the barrel length. All X-Series pistols are in fact offered in three basic models, the 4.4 in / 111 mm barrel (X-Short), the 6 in / 152 mm barrel (X-Six), and the 5 in / 127 mm barrel X-Five model like the P320 we tested.

SIG Sauer P320 X-Five in detail

All4shooters already dedicated a full article to the P320 X-Five. What we can say here is that probably the most eye-catching aesthetic feature are the three large windows, or cut-outs, on the top of the slide. This are for slide weight reduction, just like the beveled design – a trademark of the X-Series pistols.

The grip module is exclusive to this line and features a deeper trigger guard undercut, a higher back strap and an extended beavertail to ensure a higher grip for better recoil management. In the rear area of the frame there is also a removable 48.5 g weight for improved balance, as well as a removable magazine funnel and an extended slide catch lever.  

Die schnittigen SIG Sauer P320 X-Five mit und ohne ROMEO1 Leuchtpunktvisier in beiden Seitenansichten. Wie man unschwer erkennen kann, ist der Verschlussfanghebel beidseitig vorhanden.
The sleek SIG Sauer P320 X-Five match pistol with and without ROMEO1 red dot sight.

The sights consist in a Dawson Precision fiber optic front sight and a fully-adjustable rear sight. The rear sight cover plate can be easily removed and replaced with a SIG's Romeo1 Micro Reflex Sight. Other MRDS makes can be mounted, but you'll have to look to the accessory market to find the correct mounting interface. In addition, there is a Picatinny rail on the dust cover for lights and lasers.

As regards materials, slide is stainless steel with a black nitron finish and barrel is carbon steel. 

SIG Sauer P320 X-Five: the test

Full Size X-Grip-Griffstück der Matchpistole P320 X-Five mit weit nach oben reichendem, griffigen Checkering und verlängertem Griffsporn.
The trigger is flat-faced, straight and breaks at 90 degrees.
Test: SIG Sauer P320 X-Five – das modulare Flaggschiff der X-Series
The finely granulated grip panels and the beavertail allow for a high, firm purchase.

The SIG Sauer P320 X-Five we test-fired was chambered in 9mm Luger (9x19mm). It must be pointed out since the X-Series modularity extends to caliber conversion (in .45 Auto, .30S&W and – for the US market only - .357SIG). Our gun also sported a 21-round magazine, which is standard with the P320 X-Five.

In hand the pistol feels extremely solid and well-balanced, especially with a full magazine inserted. Ergonomics is beyond reproach. The fiber optic front sight is always perfectly clear and bright with a good contrast on targets even in low-light conditions – we can confirm that because we had some cloudy moments from time to time during our test on 

Dawson Precision-Leuchtkorn der Matchpistole SIG Sauer P320 X-Five in 9 mm Luger
The front sight consists in a Dawson Precision fiber optic type.
Voll verstellbare Mikrometerkimme der Matchpistole SIG Sauer P320 X-Five
Rear sight is fully-adjustable. The rear sight cover plate can be easily removed and replaced with a SIG's Romeo1 Micro Reflex Sight.

The finely granulated grip panels and the beavertail allow for a high, firm purchase, effectively helping control recoil and muzzle flip. This improves overall controllability and aids quick sight re-alignment. It seems that the internal frame weight also helps in reducing recoil too – or better, it helps in providing a better gun balance even during quick shot strings. And you can shoot fast with no worries indeed: thanks to the detachable jet funnel mag well you can perform magazine changes in a blink.

Abzug der Matchpistole SIG Sauer P320 X-Five mit geradem Abzugszüngel und sportlich-dynamischer Charakteristik
The trigger is flat-faced, straight and breaks at 90 degrees.

The trigger is flat-faced, straight and breaks at 90 degrees, with no perceptible overtravel.  At 4.6 lbs from the factory, pull weight is a dab lighter than standard P320s. All in all, it's probably one of the best triggers you can find on a striker-fired gun out-of-the box. Needless to say, the P320 X-Five worked flawlessly during our testing, swallowing round after round with reliable monotony.

Ein volles Magazin wird in den Magazintrichter der SIG Sauer P320 X-Five Polymerpistole eingeführt.
The detachable jet funnel mag well makes magazine change easier. In the background, an example of SIG Sauer P320 X-Five's accuracy.
Sportschütze Tino Schmidt schießt die Matchpistole SIG Sauer P320 X-Five auf dem Schießstand
Firing the SIG Sauer P320 X-Five.

Accuracy is exactly what you can expect by a SIG competition gun equipped with a match-grade barrel: absolute and steady. After a couple of magazines you start seeing that all your bullets consistently land square on the center of the target. You simply get the feeling that you are shooting with some kind of sci-fi laser gun rather than a firearm. It's common even with other SIG's X-Series pistols, as a matter of fact.

Few manufactures can rightly claim to offer competition-ready guns: with the P320 X-Five SIG Sauer is one of them.

SIG Sauer P320 X-Five: watch the video from our all4shooters test firing

SIG Sauer P320 X-Five: technical data

Model:P320 X-Five
Manufacturer:SIG Sauer
Caliber:9 mm Luger (9x19mm)
Magazine capacity:21
Barrel length:5 in /127 mm
Overall length:8.5 In / 216 mm
Width:1.6 In / 41 mm
Height:5.8 In / 147 mm
Weight:35.6 oz / 1 kg
Price:1,375 Euro

Further information on the P320 X-Five can be found directly on the of SIG Sauer website.

Image Gallery: Visiting SIG Sauer USA and the SIG Sauer Academy.

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