The Sig Sauer P365 Nitron is a legend in its own lifetime. So there was always going to be a slew of Sig P365 accessories, upgrades and aftermarket parts.
We have a full list of suggestions, but if you just want us to STFU and point you to the Sig Sauer accessories and upgrades, well we can do both:
Custom Sig P365 Off the Shelf
Before you go spending money on upgrades, parts and accessories, be sure the pistol you actually want isn’t sitting there on the shelf. Here are a few options for you.
1. Sig Sauer P365 X-MACRO
- Price: $799.99
- Barrel: 3.1 inch
- Total Size: 5.8 inch
- Weight: 1.12lb
- Capacity: 17+1
The X-Macro might just be the best compact 9mm pistol on the market right now. it’s that good.
If you can handle the price bump from a Sig Sauer P365XL, you get 17+1 rounds of 9mm ammo in a package that easily conceals. The compensator means it is slightly longer than the standard pistol. But it’s so cool.
Also that comp actually works and helps tame the famous P365 recoil.
2. Sig Sauer P365 SAS
- Price: $605.99
- Barrel: 3.1 inch
- Total SIze: 5.8 inch
- Weight: 1.12lb
- Capacity: 10+1
SAS Might Be Best Custom Sig Sauer P365 Micro-Compact
Sig sent its own engineers to work to refine the new benchmark for concealed carry pistols. The Sig Sauer P3655 SAS is the result and it costs just $599.99.
Before you go spending $1000 to tune a stock Sig Sauer P365 9mm at the parts and accessories shop, make sure this wasn’t the custom Sig you wanted all along.
It has a ported slide. You also get a trick Meprolight FT front sight that works like a very vague red dot sights system. That’s a third party upgrade, but the precision Sig engineering happens in-house.
Defensive Pistol Specialist
The P365 SAS is not as accurate at the range as classic sights that line up planes. But as a defensive sight then we like it a lot. Especially integrated into the slide like this.
That’s a long way towards a completely custom gun and you no longer have to buy
3. Sig Sauer P365XL Spectre Comp
- Price: $1,199.99
- Barrel: 3.7 inch
- Total SIze: 6.5 inch
- Weight: 1.20lb
- Capacity: 12+1
The Sig Spectre 365 XL with a compensator is a flashy, John Wick style gun that you kind of want.
There are cheaper Spectre Works guns on sale here. Just organise the price low to high and you might grab a bargain.
Not only is the slide fitted with an integrated compensator, you also get XRAY sights, a flat gold trigger and other custom touches. It’s a totally reworked, high price, high spec Sig Sauer P365XL that probably isn’t worth the money, especially when the X-MACRO is standing right there.
But it is really cool. That can be enough.
But if you want a DIY custom gun, what are the best Sig Sauer P365 upgrades & accessories for sale in 2023? Here are our picks.
1. Sig P365 Extended Magazine 15 Rounds
- Price: $49.99
Sometimes the cheapest and simplest mods you make are the best. And there is no denying the straight value of five extra rounds in each P365 magazine.
An extended magazine is one of the fastest ways to measurably improve any gun. This one isn’t the prettiest, but it does give you some extra real estate with a pinky extension and then some to get a better grip on your gun.
You can also get a pinky extension on a 10-round 9mm magazine if you live in ‘those’ States.
The benefits go beyond the extra ammo in your 9mm magazine, then, but that’s really the big news here. Five more rounds makes the rest of this stuff look like window dressing. So get a new P365 magazine before anything else.
2. Custom Slide
- Grey Ghost Precision
- Price: $418.99
Custom slides for the Sig P365 accessories market are big business. But not all the big guns have options out yet.
Custom Glock experts Grey Ghost Precision has released the Grey Ghost Precision Sig P365 V1 and it is epic.
You get real tangible benefits, like a loaded chamber indicator and an RMR plate for a micro red dot, specifically the 3 MOA Sig Sauer Romeo 1. You also get the screws to fix the Springfield Armory Shield SMS-C.
The serrations are much more aggressive, which gives you a fighting chance of manipulating this micro compact handgun with gloves on. In the rain and snow, they’re a benefit, it’s that simple.
Grey Ghost Precision makes accessories and upgrades that are revered by the Glock and AR-15 community. They’re good and this video for the P320 slide shows just how good..
3. Wilson Combat Grip Module
- Price: $64.99
Wilson Combat and bargain aren’t words that go together too often. But you can give your Sig P365 that legendary Starburst grip for less than $65.
This module reprofiles the grip and handling characteristics. The company says the gun’s infamous recoil is contained better with this grip angle and bore axis adjustment. It has to be fractional, or the stock parts would struggle to fit, but you can see a difference.
And pretty much all Wilson Combat parts are more than $65. So this is a rare treat.
4. True Precision 9mm Threaded Barrel
- Price: $170.99
The True Precision Sig Sauer P365 match grade barrel is good to go with a
This True Precision custom barrel is made from 416R steel. The threaded match-grade barrel gets 6-groove rifling. The SAAMI spec chamber and polished feed ramp should give you a tangible improvement with the cycling times too.
Ported Slide Adds to the Visual Effect
If you have opted for a ported slide, too, then this True Precision match grade barrel will peak through and transform the look of your custom pistol. But a short barrel that fits flush might make more sense.
True Precision is already well known in the Glock modding community for its match-grade barrels, the occasional custom slide and other accessories and upgrades. It tends to focus on the shorter Glock 43, and models like the Smith & Wesson M&P Shield.
5. Sig Romeo 1 Reflex Micro Reflex Sight
- Price: $399.99
Not everybody wants a reflex sight on their concealed carry pistol, until they try one.
Plenty of people don’t have 20/20 vision anymore. In a personal defense situation, too, nerves go through the roof and focus can be a real issue. It isn’t a sin to take all the help you can get.
These Sights Really Work
Micro red dot sights are taking off in a big way and we can vouch for both the Sig Romeo 1 and the Springfield Armory Shield. Both automatically adjust to the ambient brightness and gives you a clear field of view through the reticle.
That in itself can be huge in a home defense situation, although it is limited in what it can do with the dark.
If you are going to spend that kind of money on an optic, you might want to go the whole hog and buy a custom gun rather than shop all gun parts.
Some come with an optic as part of an extensive package of goodies that add up to good value. Even at $1000+ But the gun with the custom slide is designed with a mini reflex sight in mind.
6. Tyrant Designs Sig P365 Compensator
- Price: $79.95
Call it the John Wick effect, but we’re all that little more accepting of compensators on small guns thanks to the super assassin.
You know it’s true.
You also know that the stock Sig Sauer P365 9mm, while awesome, is a little snappy. Tyrant Designs claims to have tamed the beast with this simple compensator.
You’ll need a threaded barrel, but the compensator screws right on and you can use any open ended holster with this compensator attached.
But if you have the 365 and you just want to calm the muzzle rise, then these are the Sig P365 accessories you need.
Here’s the Tyrant Designs T-Comp in action and we have to say, it looks like it’s working.
7. Sig Sauer P365 9mm Flat Trigger
- Price: $36.99
The flat trigger that comes as standard on the P365 XL just looks better.
Does it feel better? That’s much more subjective. But the aesthetic argument is just done.
Well you can throw away your traditional trigger and replace it with a Sig 365 upgrade that is an OEM part from Sig. As accessories and upgrades go, this is one of the simplest.
Just $45 at the Sig parts & accessories store will get you the real deal and it’s a cinch to fit. And the flat trigger is one of many custom parts, acessories and upgrades you can find at Sportsman’s Guide.
Get a 9mm 10 round magazine, an IWB holster, conversion kits, grips, a recoil reduction spring or a complete custom gun here.
8. Techna Clip Gun Belt Clip
- Price: $24.99
This simple belt clip eliminates the need for a holster. You do affix the clip permanently to your gun, so this is something you ither do all the time or never. But some people love a simple belt clip, and that’s what this is.
9. Lightning Strike Steel Striker Pin
- Price: $119.99
This was one of the hot new products for the Sig when it launched and had all those problems with the striker pin shearing. The Lightning Striker Steel Striker Pin was an instant fix for that troublesome issue and it’s still an upgrade.
Now we haven’t heard of any reliability issues of late, so this may be a redundant upgrade. But if you’re the kind of person that wants the best, then this is still a better option than the OEM striker.
10. Sig Sauer Foxtrot365 Tactical Light
- Price: $149.99
Things generally go bump in the night. So if you use your 9mm as a nightstand pistol, or you’re happy to compromise concealment for capability, then the Sig weapons light can be a real benefit.
At night, a blinding light can be all you need to gain a competitive advantage. This 100 Lumens LED light is seriously powerful.
Hands Free Operation. The Light Not the Gun. Obviously.
You get a hand free that would otherwise be full of flashlight and your weapon follows your weapon lights, which follows your eyes. There are serious tactical advantages to a weapons light if you’re gun parts shopping and you’re just not sure.
Add sights/red dot sights up top for a complete tactical approach and you just made your best gun a bit better for home defense.
Obviously, the Sig Sauer Foxtrot360 Tactical Light does advertise your position pretty clearly. In most one on one situations, though, it gives more than it takes. You could always go full Kickass with a strobe, too.
You can remove the weapon lights with a single wrench in seconds for daytime use or better ease of concealment. When you need to shed some light on things, though, you’ll be glad you have the Sig Sauer Foxtrot365.
11. Crossbreed Supertuck IWB P365 Holster
- Price: $60.76
Crossbreed Holsters are some of the best Sig Sauer P365 holsters on the market.
Two clips and the central holster means
There are lots more compact P365 holster options on the market, and more rigid ones too. Check out just a few best-selling options here.
12. Sig Sauer SRD9 Suppressor
- Price: $699.99
- Caliber: 9mm Luger
Some States still want you to have fun and a suppressor can be just that. But where can you buy a suppressor online?
We got you.
Now forget about barrel length, weight, everything. But you knew that right? And your gun might not cycle, maybe 50% of the time. But except for that…
You do get this in return.
Silencer is Multi-Purpose Tool
A suppressor and the NFA paperwork that goes with it can be a real investment.
Your tiny stock gun will look ridiculous and might not cycle too well with this monster up front. But try it, for fun with silencers, accessories and just plain ridiculous shit like ebay lights, lasers etc. Because you can.
You know you will. I did.
13. Sig Sauer Lima P365 Laser Sight
This OEM laser sight slots right on to the Sig for a low-drag draw that paints a red laser dot right on the target. Or a green laser, it’s really your choice.
In the heat of the moment, a clear line of fire can be a lifesaver. The light alone has that intimidation factor, too, so some people prefer to carry a weapon-mounted laser sight.
This one is an official part so it’s designed to fit like a sleek glove and pumps out that green laser, or red laser, on demand. It attaches to the rail and simply slots on and off, but it’s designed to shrinkwrap itself to the frame.
Automatic battery shutoff means the laser only lights up the sky when you point it there. Apart from that, there’s not much to say. This is the best laser for the Sig Sauer P365 9mm Luger.
14. Pearce Grip Extension
- Price: $7.99
Get 5/8ths of an inch more real estate on the famously tiny Sig P365 handle with this basic magazine baseplate replacement.
The Pearce Grip Extension is cheap, it works and most people seem to like it. We’re not sure what else to say really…
15. Grayguns Grip Module Sig P365 Micro Compact
- Price: $84.99
Halle Berry carries a full custom Grayguns Sig P365 into battle in John Wick 3.
You can get the
Grip modules are seriously good these days and you have to switch out the internals. That’s it. You don’t have to register a new frame with grip modules, it’s kind of a jacket for your existing gun.
Custom stippling is harder than it looks, too, and this P365 grip module is pre-cut to perfection. A few minutes with the gunsmithing tools and you’re good to go. And let’s face it, there’s no way you could achieve this look with a hot iron.
Grip modules also work if you did stipple your gun and got it horribly, horribly wrong.
16. DPM Recoil Reduction System
- Price: $75
The 365 is a snappy little creation and there are various ways to combat muzzle rise, increase your cycling speed and improve your accuracy. This is the best for $75…
Three springs combine to create staged resistance and the third spring controls the slide. That stops it ramming the frame and potentially increases the lifespan of your micro-compact pride and joy.
An advanced spring parts kit can also reduce jams. It’s all win here…
17. SnapSafe by Hornady Dropbox Gun Vault
- Price: $129.99
The gun safes you choose could make a big difference to your home security. These are different kinds of gun parts & accessories, but we’re looking at holistic solutions here.
And the good thing about these little Sig Sauer pistols is that they can go anywhere. So make sure your hidden gun safes can too. Steer clear of the biometric ones on Amazon for now. This is a Hornady safe, with a simple electronic keypad entry system.
With these, you can keep your gun safety on point and also have your handgun by your bed, under your desk, anywhere really. And you can easily fit a full size Sig P320 in there.
Get a few safes, and a few guns, and you can feel a lot safer in your home.
Where to buy random P365 parts
You don’t always need custom gun parts & accessories. Sometimes you just want a Stock Sig Sauer pistols, replacement recoil spring assembly, accessories, ammunition, gun cleaning supplies. The usual.
Other days you want a standard 9mm Luger 10 round magazine, an IWB holster or even a parts kit to get your gun running again. Then there are accessories, ammunition, conversion kits, grips etc.
Scopes, optics and more are out there too. But a scope on a P365? Man…
Brownells seem to have a constant supply of the simple kits you always need to have lying round and other gun parts & accessories. Sights, Red dot sights, rifle parts, all that.