Sig Sauer P365X Micro 9mm

The other day I traded off a few guns and came home with a Sig Sauer P365X. The gun comes with two 12 round magazines. I had enough store credit that I also got another 12 rounder and a 17 round extended magazine.

The P365X is part of Sig's family of compact and micro-sized 9mm semiauto pistols intended for conceal carry. The original P365 is exceptionally small, while the P365X is just slightly larger with a longer grip, and has a slide already milled to accept RMS-c footprint dot sights.

Overall the P365X is a tiny gun, especially when you consider its capacity. It's 6" long, 1.1" thick, and 4.8" tall. The barrel is 3.1" long. The slide is fitted with Sig's own night sights and is cut for an optic, as mentioned above.

Top-to-bottom, P365X, S&W Model 640-1 .357 Magnum, S&W M&P Shield 9:

The P365 family is very modular because the actual "gun" for legal purposes is the fire control unit (FCU), which includes the major mechanical components. You buy different grip modules and mix and match barrels and slides to create the configuration you desire.

For several years I've owned a Smith & Wesson M&P Shield 9, which is in the micro-9 class, but never really warmed up to it. (In contrast, I like the mid-size M&P 9 2.0 and full-size M&P 9 1.0 A LOT.)

Before shooting any new gun I always field strip it, remove any factory oil, and lubricate it per the owner's manual. I do this as a quality control check and to familiarize myself with the gun in case I need to resolve any issues at the range.

Field stripping is very simple and doesn't require any tools. First clear the gun to ensure it's unloaded. Then lock the slide to the rear. Next rotate the takedown lever on the left side of the frame downwards. Release the slide (which is under spring pressure) and pull it off the front of the frame.

Then pull off the recoil spring assembly and pull the barrel out of the slide.

Reassembly is in reverse order.

To remove the FCU, first clear the gun, then field strip it as normal. Then drive out the pin at the rear of the frame, from right to left. Next, tilt rear of the FCU up and pull the unit out of the grip module.

To drive out the pin you need a 3/32" punch. A Glock disassembly tool works well.

Strangely, Sig doesn't include a printed version of the owner's manual with the gun, which comes in a nice lockable plastic box with an extra mag, chamber flag, and a cable lock. There is a basic safety pamphlet included, which has a QR code on it to scan which takes you to the Sig website where you can download the manual.

In this litigious age I am amazed Sig's lawyers approved shipping a gun without a full owner's manual. You can call Sig to have them mail you a hard copy of the manual, which I intend to do so it can stay with the gun. Seriously, Sig Sauer, what are you thinking?

Yesterday I took the P365X to the range and put a mix of S&B 124 grain FMJ and Wolf Polyformance 115 grain FMJ for a total of 105 rounds through it. It had 3 or 4 failures to fully go into battery, which were resolved with a gentle tap on the back end of the slide.

Today, I did a quick field strip, clean, and relube, then took it back to the range and this time it ran flawlessly through 152 rounds of Wolf and 14 Speer Gold Dots that I had in my range bag. Today it ran flawlessly.

The P365X weighs just 17.8 oz. (500 grams) unloaded. As expected, recoil was pretty snappy. Compared with the M&P Shield, the grip is a little rounder in cross section and more comfortable for me.

The Sig's trigger reminds me of a double action revolver trigger but lighter and  with a shorter stroke. But, unlike a DA revolver trigger I can't stage it.

Shooting such a small pistol well with its short sight radius and level of recoil demands good form. If you don't have the fundamentals down pat you won't shoot well. It is not forgiving. Yesterday, I was definitely not in the zone. Today I really concentrated on my form more and shot better.

Something that will help accuracy especially under stress is a dot sight. I plan to get a Holosun green dot for it soon.

Because of the recoil I find that extended shooting sessions with this class of gun are taxing and my shooting degrades after awhile. Today I took a few breaks during the session to sweep up my spent brass and give my hand some rest.

The P365X fits a DeSantis outside the waistband holster I have for my Shield 9. It also fits a DeSantis Nemesis pocket holster but is a bit too big for my pants pockets. It would probably work OK in a large coat or vest pocket.

Overall, I am seriously impressed with the Sig P365X. It packs an amazing amount of firepower into a tiny gun that with practice is very shootable.