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:
SAS Might Be Best Custom Sig Sauer P365 Micro-Compact
Sig has even 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 $579.99.
Before you go spending $1000 to tune a stock Sig Sauer P365 9mm, 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
Or Just Buy a Custom Gun
If you have around $1,300 burning a hole in your pocket and want a complete custom Sig P365, Danger Close Armament is ready to sell you a pistol.
Check out some of the best custom Sig Sauer P365 9mm and custom 365 XL handguns on sale in 2020.
But if you want a DIY custom gun, what are the best Sig Sauer P365 upgrades & accessories for sale in 2020? Here are our picks.
1. Sig P365 Extended Magazine 15 Rounds
- Price: $44.99
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 mag 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. 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…
3. Custom Slide
- Grey Ghost Precision
- Price: $402.19
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…
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 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.
If you have opted for a ported slide, too, then this 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 Sauer P365 9mm Flat Trigger
- Price: $44.99
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 at Rainier Arms 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 Rainier Arms.
Get a 9mm 10 round magazine, an IWB holster, conversion kits, grips, a recoil reduction spring or a complete custom gun here.
6. 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.
7. 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 light which follows your eyes. There are serious tactical advantages to a weapons light.
Add a red dot 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, that’s not a concern.
You can remove the light 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.
8. Crossbreed Supertuck IWB P365 Holster
- Price: $55.80
Crossbreed Holsters are some of the best Sig Sauer P365 holsters on the market.
The Crossbreed
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 here.
8. 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.
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 from Danger Close Armament.
Some come with an optic as part of an extensive package of goodies that add up to good value. Even at $1,699.99. But the gun with the custom slide is designed with a mini reflex sight in mind.
8. Sig Sauer SRD9 Suppressor
- Price: $699.99
- Caliber: 9mm
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 though…
Your 9mm silencer should play nice with most threaded barrels in this caliber and you could even find yourself strapping it to a 9mm AR pistol or
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.
You know you will.
9. 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.
This also works if you did stipple your gun and got it horribly, horribly wrong.
10. Sig Sauer Lima P365 Laser Sight
- $149.99
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.
11. Tyrant Designs Sig P365 Compensator
- Price: $75.95
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 on a Glock 19 and we have to say, it looks like it’s working.
12. 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 accessories and upgrades, but we’re looking at holistic solutions here.
And the good thing about the little Sig is that it can go anywhere. So make sure your 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.
Get a few safes, and a few guns, and you can feel a lot safer in your home.
For more hidden gun safe ideas, check this post.
Where to buy random P365 parts
You don’t always need custom P365 upgrades. Sometimes you just want a Stock Sig replacement recoil spring assembly, accessories, ammunition, gun cleaning supplies. The usual.
Other days you want a standard 9mm 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? Man…
Brownells seem to have a constant supply of the simple kits you always need to have lying round.
Brownells – Recoil spring, parts kits and much more for your Sig Nitron.
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This is hands down the best comprehensive accessory guide I’ve found anywhere online for the P 365. Thanks
Thanks for the kind words! I appreciate it!