Stepping up to the plate for low-cost training and to provide a fun handgun for fans of the storied brand, Sig Sauer has developed the new P322 pistol. 

Designed and constructed totally in New Hampshire by Sig, the P322 is a hammer-fired 20+1 shot .22 LR pistol that is, more than anything else, dependable with common ammo. This is no mean feat when the notoriously unreliable cartridge is its fodder. Using an internal stainless steel frame inside a polymer grip, the pistol's aluminum slide contains a single-action-only enclosed hammer. 

Sig Sauer P322 .22LR pistol
When it comes to specs, the P322 has a 4-inch barrel, which gives the blowback-action rimfire an overall length of 7 inches. Height is 5.5 inches while the width is 1.4. (All photos: Chris Eger/
Sig Sauer P322 .22LR pistol
Weight is light, due to the polymer grip frame and aluminum slide, coming in at 17.1 ounces. 

Those keeping track of such things will note this is on par with the Glock 44, which is essentially a .22 LR reimaging of the Glock 19

Sig Sauer P322 .22LR pistol compared to Glock 44
While roughly the same size, the new P322 has a lot of extras over Glock's .22 LR, including fiber-optic sights, double the magazine capacity, an MRD cut on the slide, a manual safety, and an included thread adapter for suppressor use. 
Sig Sauer P322 .22LR pistol compared to Taurus TX22
The P322 also compares well to the Taurus TX 22 Competition, having a higher magazine capacity and better sights. 


The basics

Featuring ambidextrous surface controls and an easy "no tools" takedown for maintenance, the new P322 ships with a threaded barrel adapter for muzzle devices and suppressors – no extra barrel needed – is optics-ready right out of the box, and has both a flat and curved trigger shoe that the user can swap out as desired. Other standard features include front slide serrations, an adjustable rear sight, a fiber-optic front sight, an ambi frame-mounted manual safety, and an M1913 accessory rail on the dust cover for lights and lasers. 

Sig Sauer P322 .22LR pistol
Disassembly is simple. Just rotate the takedown lever on an empty and cleared pistol, then retract and lift off the slide. Note the barrel is fixed with the recoil spring wrapped around the assembly. This helps lend the design towards accuracy. 
Sig Sauer P322 .22LR pistol
Inside the polymer grip frame is a stainless steel internal chassis that holds the fire control unit and includes a spurless hammer that is enclosed inside the slide when the pistol is assembled. 
Sig Sauer P322 .22LR pistol
Note the high cut under the trigger guard, allowing a natural grip. The surface controls, to include the slide stop and frame-mounted manual safety, are ambidextrous. 
Sig Sauer P322 .22LR pistol
The grip frame includes an integrated magazine well for rapid and easy mag exchanges
Sig Sauer P322 .22LR pistol
The frame carries an M1913 Picatinny accessory rail for lights and lasers. Note the forward slide serrations.
Sig Sauer P322 .22LR pistol
The P322 comes standard with a flat trigger shoe installed and can be easily swapped out by the user for an optional curved shoe that is included with the pistol. We found the trigger to break on our test gun at about 5.5 pounds regardless of which shoe was installed. 
Sig Sauer P322 .22LR pistol
Also included is an adapter to add 1/2x28 TPI threads to the barrel. This saves the user the problem of having to find a threaded barrel if wanting to mount a direct-threaded muzzle device or suppressor. 
Sig Sauer P322 .22LR pistol
Besides the MRD cut to the slide, which is optimized for Sig's RomeoZero pattern optics, the P322 comes standard with fiber-optic sights that show up bright during outside work. The green lines can be swapped out for red with the help of a 1.3mm hex key and really good eyesight.
Sig Sauer P322 .22LR pistols
The Sig P322, via its optics cut, thread adapter, and accessory rail, can be equipped to suit a variety of flavors.



As part of the design validation process, Sig's engineers spent more than 15 months subjecting prototype guns to a grueling and demanding series of tests, rebuilding and refining the standard as they went. This included 5,000 dry fires on each pistol and running three guns through 40,000 rounds of a wide mix of .22 LR loads drawn from across the ammo market. To ensure the P322 would be ready for hard use with accessories, half of the test guns were outfitted with optics and a variety of suppressors were utilized to ensure compatibility. 

In the end, Sig's engineers developed a rimfire semi-auto pistol that had a "mean rounds between stoppage" rate of over 1,000 rounds, an almost unheard of benchmark for a .22 LR autoloader. 

In early March, prior to the launch of the P322, Sig Sauer invited and other media outlets to an event in Orlando in which 16 attendees ran eight of the new .22 LR pistols in the Florida sun all day.

Sig Sauer P322 .22LR pistol on the range
I personally put about 600 rounds through shared P322s in a day and can vouch that the Sig .22 LR is both hard to put down and hard to stop. 

This included the opportunity to drop 200-300 rounds each through the pistols to gain some familiarity and then breaking to organize in teams and going back on the line to run a (thankfully) informal Steel Challenge Match throughout the afternoon. This gave the attendees another 200-300 rounds downrange. As we had to double up, basically two people per gun, this meant the average P322 had to chew through upwards of 1,000 rounds of CCI Mini Mags in just a few hours on pistols that were dry, right out of the box. 

Empty CCI Mini Mag containers
That's a lot of ammo. 

With that being said, I personally witnessed just a couple of failures on the line, and those being late in the afternoon on guns that were so gummed up with carbon you couldn't see the chamber. Sure, that is not an all-inclusive test, but it was a great introduction to the P322. 

Since getting back home and trialing a T&E gun, which I have put about 500 rounds through so far, I have only seen one failure, which could be ammo based as the round – an Aguila Super Extra – was dimpled but didn't go off even when retrieved and tried again. 

Sig Sauer P322 .22LR pistol
We've been testing a P322 over the past couple of weeks and are impressed so far. 



The P322 ships with a pair of flush-fitting 20-round magazines that are easy to load while extended 25-rounders and state-compliant 10-round mags are reportedly soon to be available. While Sig typically doesn't release MSRPs, preferring instead to give its dealers a Minimum Advertised Price threshold, the sweet spot for the P322 is in the $400 range, putting the gun squarely in the obtainable category, especially when stacked against competitors like the Glock 44, Taurus TX 22 Comp, and FN 502.

Sig Sauer P322 .22LR pistol
We'll be testing the Sig P322 over the next several weeks. 


Read More On:
revolver barrel loading graphic