SIG P320 M17 Review: GU Tested
Sig’s M17 is a modern pistol that won the military’s contract for a standard-issue sidearm in 2017. It replaced the (in?)famous Beretta M9 (Beretta 92F) and is only the third standard-issue military handgun since the 1911. While the M17 is based on the P320, there are some slight differences between the two. Let’s run through my SIG P 320 M17 review. We’ll see those differences and examine why the military selected it as their duty sidearm.
- Caliber 9mm
- Barrel length 3.15”
- Front sight Single front (optic ready)
- Rear sight Night sight rear plate
- Safety Manual 1911 style thumb
- Trigger Adjustable 4-4.5 lb.
- Length/Width 4.7”/1.6″
- Weight 29.6 oz. (no mag)
SIG M17 Background
Sig Sauer began in 1975 and hit the ground running with their P220. Militaries and police around the world have used the P220. But when Glock came along with a lighter gun that held more rounds and was cheaper, the fight was on. Sig was still playing catch-up with Glock when they developed the P320. The 320 was the model Sig used to enter the military’s bid for a modular sidearm. They presented the M17 and won the contract, giving them a much-needed boost in the competitive world of polymer handguns.
The M17 can be purchased on the civilian market for those who want the same version the US military uses. As mentioned above, the interchangeable grip module makes the P320 and M17 stand out from other manufacturers. For a complete lower frame that does not have removable grips, it allows the owner to customize it to their liking.
Sig has a reputation of making good quality firearms. The Sig P320 line of guns has taken their handguns to a new level and the US Military’s contract has helped increase the number of holsters and other accessories available for the P320 and the M17. But how does it stand up to the other big guys in a world flooded with innovative handgun designs? Let’s look at the M17 and see if it is a worthy contender.
SIG P320 M17 Features
1 Military tested
Every handgun is tested and reviewed by someone, but not all of them are tested by designess of the D0D. The Sig M17 has been tested and met all standards set for the MHS.
2 PVD Stainless Steel Slide
PVD is a process of coloring stainless steel and making a super hard durable finish on the outside.
3 Interchangeable Grip Module
The interchangeable grip module can be swapped out in minutes allowing the user to change the size and color of the lower frame.
4 Optics cut-out
The M17 has a removable plate allowing any optic compatible with the Romeo1 Pro to be installed.
5 Picatinny accessory rail
To mount your favorite weapon light under the front.
6 Aftermarket support
Extensive aftermarket support means accessories – like extendos and mag extensions – will be readily available.
Variations of the M17
There is currently just one of significance (the M18), although several aftermarket grip modules are available.
M17 Pistol – Our Take
Sig’s line of the P320 has only continued to grow after it was released. The M17 model has become popular on the civilian market because of the military’s contract for the weapon. One of the benefits of the Sig M17 is the extensive testing it undergoes during the selection process. This does not mean that other models did not undergo the process as well, but it does mean the M17 has been proven to be reliable. While it is based on the P320 platform, lets break it down and see what the differences are.
M17 out of the box
The M17 comes standard with a coyote PVD finish on the slide and coyote tan on the grip module. It comes with three magazines, one 17 round, and two 21 round extended mags. If you are wanting an optic, the slide is pre-cut for any Romeo1 PRO compatible optic. All you need to do is remove the two set screws holding the plate on, and the optic is ready to install.
One thing I like about the M17 is that it has a different look than the standard all-black handgun most manufacturers are spitting out. Choosing to do two shades of brown gives the gun a nice look. It retails in the $649.99-$800 range depending on the accessories included in the case. The grip module can be changed for a different color, but it would be nice to see some other colors on the slide someday too.
Because of the military contract, there are plenty of holster options and other accessories for the M17. This is something I always look at before purchasing a handgun. It can be problematic to buy a weapon and have no options for holsters. I like the trigger on the M17 a little better than the Glock 17 trigger. It is smooth and has a crisp break. The M17 doesn’t come standard with a threaded barrel, but aftermarket barrels can be purchased for it.
There are some slight differences between the P320 and the M17. This included the iron sights and optic cut-out on the slide, but the biggest difference was the manual safety. The M17 has a 1911 style safety that makes the interchangeable grip safety different as well. Other parts are the same as the P320, but if you want a different grip module, it will have to include the cut-out for the safety.
There are options out there, just not as many as there are for the P320. I found a Wilson Combat grip module that works with the M17 for under $100. The grip module that comes standard with the M17 however is comfortable, and I found myself switching back to it.
Holding the M17 reminds me of a 1911. This is mostly because of the way the slide and grip are orientated along with the thumb safety and slide release. It has that natural feel of pointing that you see with a 1911 as well. The 1913 Picatinny rail has plenty of room for most handgun-mounted flashlights.
The texture on the grip portion of the lower frame is light. I don’t like to have sandpaper on my grips, but I would have liked to see a little more texture on the sides and back portion of the grip.
Reliability & Accuracy
Most newer handguns being produced are much more reliable than they used to be. When they do have issues, it’s usually hollow-point ammo they don’t like. I have fired a lot of FMJ out of the M17 but not as many HP rounds. Testing a gun’s ability to eat ammo is never boring. I rounded up a few different types of HP ammo and headed to the range. I stuck with the most popular brand: Sig, Winchester, and Hornady. I fired a total of 300 HP rounds through the M17 and didn’t encounter any issues. This didn’t surprise me with the extensive testing that has already been done since the M17’s release.
There are some handguns out there I would call reliable for self-defense, but this thing is ready for battle. The accuracy of the M17 is what you would expect from a quality gun with a 5-inch barrel. I was able to hit metal targets out to 75 yards easily and keep good groups on paper out to 30 yards. With a red-dot, accuracy on this thing would be even better.
SIG P320 M17 Pros and Cons
- Reliable – Never fails to go bang when you pull the trigger
- Optic read – nNt as novel a thing as before; all but necessity now
- Interchangeable– Grip modules are a great multiplier
- Thumb safety – Reminiscent of the 1911
- Monochromatic – No color options for finish
- Limited modules– Limited grip modules for the M17/M18 versions
- Higher end– Not top-shelf price but not budget-friendly either
Unless you have small hands, this thing is easy and fun to shoot.
No malfunctions with any type of ammo I fired through it.
I would like to see just a little more texture on the grip, but the gun feels natural in your hand.
The longer barrel helps with accuracy and the trigger pull was smooth and light.
You get what you pay for. The M17 is a little on the high end but you get a quality, durable gun.
Reviewed by Jason Mosher
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P320/M17 Gun Deals
Recommended M17 P Ammo
I used mostly American Eagle 115 grain target for range ammo. I prefer Hornady Custom 125 grain HP for a defensive load.
Other options include:
MagTech 9mm 115 GR FMJ Ammo
Cost Per Round
|Natchez Shooter’s Supply||$0.24|
|Palmetto State Armory||$0.34|
Self Defense Ammunition
Hornady Critical Defense 115 GR
Cost Per Round
There are a few things I’d recommend for the M17, starting with the Wilson Combat Grip Module for M17 – Black and a Safariland Level One Retention Holster. If you are interested in some holster customization options, the Modular Holster Adapter is worth a look.
Some others include the following. Remember: make sure your preferred holster will fit the WML and optic on your gun.
|Compare top eyepro|
|Compare best earpro|
|Compare top kits|
|Compare biometric safes|
SIG M17 Maintenance
A reliable handgun requires regular maintenance and cleaning, but you have to know how to break it down in order to do so. Take a watch at this:
Suggested Resources For You And Your SIG P320 M17
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