In this Sig P320 X-Five Legion review, we’ll be covering the new Legion version of the P320 X-Five by Sig, and give an in-depth look at how it compares to its previous versions of the p320 series of handguns by Sig.

Looking for a hint about what we thought? The new X-Five Legion P320 is my new IPSC/3-Gun competition pistol.

P320 X-Five Legion


at Brownells

Reliability: A+
Customization: A+
Accuracy: A+
Ergonomics: A+
Value: A+

Final Grade: A+

Sig p320 X-Five Legion Background

The Sig p320 series of pistols are truly modular firearms wherein the internal chassis is technically the “firearm” and all of the external components (including the grip housing) are merely parts and they are ALL interchangeable.

This means that a shooter with one p320 chassis can have a pistol in a subcompact configuration with a small frame and a short slide and then easy swap parts to convert it into a full size pistol. There are varying sizes, widths, caliber, and even feature levels – for example, there are X-Series versions which feature upgraded parts like improved flat triggers and a unique geometry to the grip housing.

The p320 pistol won the recent Army contract and is now the new sidearm for US forces.

There have been plenty of p320 models in the past few years – my favorite (until now) being the p320 X-Carry (full size x-frame grip module with a medium length slide).

The upgraded full-size p320 is the X-Five series p320 and the Legion series of each Sig firearm is an upgraded model with unique pro-inspired features. This new gun is the upgraded upgraded p320… and we LOVE it.

P320 X-Five Legion Features And Changes

Unlike most polymer pistols, the p320 X-Five Legion takes interchangeable 1911 style springs so shooters can tune the gun how they want!

It’s like cheating.

True innovation! This has the forgiveness of polymer with the weight of steel. It’s the new standard.

A mag well to aid reloads that is just the right size.

This bad boy is ready to take a red dot optic if you’d like to use one and it has AWESOME iron sights if you don’t.

Reduce reciprocating mass and lower the center of gravity allowing for faster follow up shots.

P320 X-Five Legion Review – Our Take

This is quite possibly our favorite gun we’ve reviewed. It’s not that it’s the best gun for every purpose (it’s not), but rather I am very critical of guns and even guns that I love I am able to find something that could be changed or a feature that doesn’t quite “do it” for me.

Although the p320 X-Five Legion has a specific use as a competition/range pistol… I love every single thing about this. HUGE kudos to the product manager in charge of this gun. Every thing is right and I wouldn’t change anything.  Seriously – bookmark this page for proof that I can find a gun where I can’t nitpick even one flaw.



This Sig P320 X-Five Legion CLEARLY wins editor’s choice for competition-ready handguns. Although I love this gun, it is not suitable for concealed carry and it might be too heavy for duty use.

sig x5 legionBefore I shot this gun, Phil Strader (yeah, that guy) insisted that I shoot a standard p320 first to remind myself what the recoil felt like. I shot a few rounds of the standard p320 and then he handed me the p320 X-five legion to shoot. I giggled. Yes, that’s right, my first reaction was to laugh at how awesome it felt!  If I find the video, I’ll put it here for you below.

Let’s run through what we love about this gun:

Steel Guide Rod: By using a one-piece steel guide rod, Sig was able to add some weight to the front of the gun to reduce muzzle flip and it allows for something really cool that is all but unseen on stock polymer/striker fired pistols: the ability to change 1911 style recoil springs so that the gun can be tuned to your particular load!

p320 legion xfiveSkeletonized X-Series Trigger: The flat x-series trigger is awesome (although it took me a while to get used to). The trigger in this gun is clearly an upgrade over standard triggers and it competition ready out of the box.

Tungsten Infused Polymer: Huge huge huge kudos to Sig for thinking outside the box on his one! Sure, you can add weights to a polymer frame on other pistols (even p320s) but adding tungsten powder INTO the polymer mixture is revolutionary.  It adds tons of weight with just the right balance. You get the recoil control of a steel gun with the recoil forgiveness of a polymer gun – best of both worlds!

Magwell: Often, magwells are obnoxious. This magwell, however, is just the right size. It’s big enough to allow for fast reloads and to give a nice rest for the bottom of my grip hand while being small enough to be manageable.

Sights/Optic: As all new guns should be, the Sig X-Five P320 Legion is optic ready for the red-dot sight of your choice. And if you prefer iron sights, it has an awesome set of adjustable iron sights.

Slide Lightening Cuts: These make the slide lighter and faster. This results in less reciprocating mass to allow for faster follow-up shots and it lowers the center of gravity for easier recoil control.


This pistol just BEGS to be shot and someone would have a hard time convincing me that there was a better out-of-the-box competition ready pistol available. I have ZERO reservations in admitting that the P320 X-Five Legion is my new competition gun because it solves every single issue I have with every other gun I use.

Sig P320 X-Five Legion Pros and Cons

Tungsten infused polymer

X-Series Trigger

Interchangeable 1911 style recoil springs

Optic Ready

Awesome Adjustable Sights

Just-right-sized Magwell

X-Series Frame shape with high beavertail

Competition-ready flush-fit magazines

I can’t shoot three at once

Report card

Reliability Runs and runs and runs


Accuracy More accurate than me


Customization Interchanges with all p320 systems components and tunable springs


Ergonomics This thing feels great in the hand and just begs to shoot fast!


Value Everything you need to have a fully set-up competition pistol – in one box!


Final Grade: 

Sig p320 X-Five Legion Specifications

Caliber 9mm
Capacity 17 Rounds
Overall Length 8.5 in
Overall Height 5.8 in
Overall Width 1.6 in
Barrel Length 5 in
Sight Radius 6.8 in
Weight w/ Mag 43.5 oz