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The Sig P320 is one of the most modular and configurable striker-fired guns on the market.
The interchangeable trigger pack is a brilliant design by Sig. It makes it super easy to change the grip size and slide length, without purchasing a whole new pistol.
That makes it a pretty solid suppressor host, since you can just drop the trigger pack into a different grip with a different slide if you want to have a suppressor variant and an unsuppressed variant.
SPOILER—if you want to know which Sig P320 threaded barrel is best, without reading about every barrel on the market, get one of the SilencerCo Threaded Barrels. SilencerCo makes amazing suppressors. So they know a thing or two about making suppressor components. You can trust a SilencerCo barrel.
If you’d like to read about all the best Sig P320 barrels on the market, we’ve got them all in one place for you. Keep reading.
Top Sig P320 Threaded Barrels on the Market Today
The Best Sig P320 Threaded Barrels Reviews: Sig Suppression
The overall best Sig P320 threaded barrel is up for review first. The best Sig P320 threaded barrels from each category will be presented in order of price.
The most affordable Sig P320 threaded barrels are up top.
The high end (but high priced) Sig P320 threaded barrels are near the end.
Let’s add a few suppressors.
1. SilencerCo Threaded Barrels - Overall Best Sig P320 Threaded Barrels
The SilencerCo Threaded Barrels are almost a straight over replacement for your factory Sig P320 barrel.
This barrel is machined to the exact dimensions as the OEM barrel. This is necessary to ensure proper fit in the slide. However, it has the added benefit of retaining the precision of your factory barrel. So you can be just as accurate with this barrel as you are with your unmodified Sig P320.
Additionally, since the dimensions are the same, this barrel cycles reliably with or without a suppressor. And it works just fine with any sort of ammunition, just like the factory barrel.
Lastly, the black nitride coating is just as durable as the factory finish, and resists slide wear just as well.
On the threaded portion, the threads are precisely cut and the finish doesn’t interfere with the threading. These barrels easily accept suppressors and compensators.
When you thread muzzle devices onto this barrel, the precision machining is evident because muzzle devices screw on remarkably smoothly.
The only real downside to these barrels is that they only fit the P320. These barrels won’t fit the M17, because there’s no cutout for the loaded chamber indicator.
It’s kind of a bummer because a Sig 320 barrel will fit in the M17. But it doesn’t work the other way around. So it would be nice if there was a loaded chamber indicator cutout to fit both models.
But, this is a Sig 320 barrel. So it’s not a crime that it only fits the P320. Even if it won’t fit an M17, this is still the best Sig P320 threaded barrel you can get. And it’s not even the most expensive barrel on the market.
2. TRYBE Defense Sig Sauer P320 Compact Match Grade Threaded Pistol Barrel - Budget Sig P320 Threaded Barrel
The TRYBE Defense Sig Sauer P320 Compact Match Grade Threaded Pistol Barrel is a very affordable Sig P320 threaded barrel that gives you the capacity to attach a suppressor or compensator without burning your entire ammunition budget.
But, this isn’t just some cheap barrel. It really is a match grade barrel that produces match grade performance.
The dimensions are the same as the factory barrel. And the rifling is pulled broach rifling that’s comparable to the factory rifling. So the fit, lockup, and bore produce at least the same level of organic precision as the factory barrel.
Where this barrel differs from the factory barrel is the muzzle. This barrel has a target crown that’s notably deeper than the crowning on the OEM barrel. This maximizes the precision and better protects the rifling.
The threading on this barrel is very well cut. And the finish doesn’t interfere with installing muzzle devices. Suppressors and compensators screw on and off super smoothly.
This barrel comes in 3 different finishes: black nitride, titanium, and DLC. The nitride finish is smooth and looks really good out of the box. However, it’s not quite as durable as the factory finish.
The titanium and DLC coatings seem to be about as tough as the OEM finish, though.
Lastly, this TRYBE Defense threaded barrel comes with a matching thread protector, which is more than you get from some more expensive threaded barrels.
Unfortunately, like many P320 barrels, this barrel doesn’t fit the M17 model. But it fits great, and is a great value, in any compact Sig P320.
3. Grey Ghost Precision Sig P320 Compact Barrel - Sig P320 Compact Threaded Barrel
The Grey Ghost Precision Sig P320 Compact Barrel one of the best Sig P320 barrels, period. But you can get it with threads. So it’s one of the best Sig P320 threaded barrels, too.
Grey Ghost’s manufacturing is remarkably precise. Grey Ghost barrels are machined to within .003 inches of the specified dimensions.
The tolerances are so tight that you won’t see any performance difference between two Grey Ghost barrels. But most shooters won’t be comparing one to another.
What this means for you is that you won’t get a lemon. When you buy one of these barrels, you know you’re getting what you pay for.
And this barrel is precisely machined to the same dimensions as the factory barrel. And the target crown is even deeper than the factory barrel crown. Reports from the field are that this barrel is actually more precise than the factory barrel.
That might be hard to measure without a vice. But you’ll get at least as much precision as you get from your factory barrel.
The precision machining also shows its quality in the threading. Muzzle devices freely and smoothly screw onto this barrel. It’s remarkably smooth finish without any burrs or imperfections.
Additionally, the finish is remarkably durable. It’s just as durable as the finish on your factory barrel. The finish resists slide wear surprisingly well.
Unfortunately, this Grey Ghost Precision barrel doesn’t fit the M17. But it’s a Sig P320 barrel, anyway. So it makes sense that it wouldn’t fit a different gun that happens to be almost exactly the same.
If you have a P320 compact, though, this barrel is easily one of the best options available, even if you don’t need the threading.
4. Grey Ghost Precision P320 Full Size Threaded Pistol Barrel - Sig P320 Full Size Barrel
The Grey Ghost Precision P320 Full Size Threaded Pistol Barrel is just the full size version of the Grey Ghost P320 Compact barrel. So this section will be short.
This barrel is super high quality and precisely machined. It’s just as precise and reliable as your factory barrel. And some shooters report that this barrel is more precise than the factory barrel.
It might be a bit expensive. But these barrels are always machined to within .003 inches of the specified dimensions. The quality control is exact. And you always get what you pay for with this barrel.
Additionally, the precision machining makes the threads on this barrel super smooth. The finish is also quite smooth and doesn’t interfere with the threading. Attaching muzzle devices feels like the threads are oiled.
The finish is also super durable and resists slide wear just as well as the factory finish. That’s impressive because the Sig factory finish is quite durable.
This isn’t a budget barrel. But it’s very well built and delivers exceptional precision. It’s well worth every penny.
5. Faxon Firearms Sig Sauer P320 Compact Flame Fluted Barrel - Fluted Sig P320 Threaded Barrel
The Faxon Firearms Sig Sauer P320 Compact Flame Fluted Barrel gives you all the benefits of a fluted barrel, with a very unique look.
This barrel is manufactured for a tighter, more precise slide lockup. That produces more precision than the factory barrel.
However, the tighter lockup doesn’t affect reliability. This barrel is just as reliable as the factory barrel. And this barrel works with any ammunition, including cast lead bullets.
Where this barrel matches the OEM barrel is the crown. The target crown is the same angle as the factory barrel. It’s not amazing. But it works to protect the threads.
The big deal with this barrel is the fluting. It’s machined with Faxon’s proprietary flame fluting that makes the barrel more rigid and enhances cooling. However, the fluting looks a lot cooler than traditional fluting.
It might be too aggressive if you prefer the look of a plain barrel or straight fluting. But the barrel hood is standard. You can’t see the fluting when the slide is forward.
Even if you don’t like the look, you get the benefits of the fluting without a blatantly aftermarket look.
The finish looks great. And it holds up pretty well. However, it does show slide wear a bit faster than the factory finish.
This Faxon Firearms barrel is definitely on the expensive end of the spectrum. However, it’s not just a plain threaded barrel. This barrel definitely lives up to the price with its precision and aesthetics.
6. Griffin Armament Pistol Threaded Barrels with Micro Carry Comp - Sig P320 Threaded Barrel for Concealed Carry
The Griffin Armament Pistol Threaded Barrels with Micro Carry Comp is an excellent option for anyone who wants a threaded barrel that offers some benefits when there’s no muzzle device attached.
Before we get to the muzzle device, though, this barrel is manufactured to exceptionally tight tolerances with thorough quality control. This barrel is expensive. But you know you won’t get a lemon when you buy this barrel.
Additionally, the chamber is honed and highly polished to ensure reliable operation with any type of ammunition—brass cased or… otherwise.
However, all of this is pretty much table stakes for a barrel at this price point.
The thing that justifies the price is the Micro Carry Compensator. It’s a compensator that’s about the size of a thread protector.
Now, the compensator is a fairly minimal, single port compensator. It’s not going to magically eliminate all recoil. But it’s a super compact compensator that gives you a bit more control in a comp that fits in almost any holster.
There are very few compensators that are as compact as this one (in fact, there might not be any compensators that are this small). And this Griffin Armament barrel is a totally legitimate threaded barrel that would be a good value, even without the compensator.
Adding a Muzzle Device
A threaded barrel can really maximize the modularity and configurability of you Sig P320. Being able to add a muzzle device at will just pairs so well with the swappable trigger pack. It gives you as many options as possible.
If you just want a solid threaded barrel that will perform well with or without a suppressor, get one of the SilencerCo Threaded Barrels. They’re reasonably priced. And these barrels are built by a company that makes better suppressor components than almost anyone else.
Now that you know your options for adding a threaded barrel to your Sig P320, it’s time to add a threaded barrel, and get that last bit of configurability from your handgun.