Best SIG P320 Threaded Barrels – 2024 Ultimate Round-up

| Last Updated:
August 10, 2023

The Sig Sauer P320 is a semi-automatic handgun that is popular amongst civilian shooters for concealed carry, home defense, competitions, and target shooting.

In some circumstances, shooters have the need or desire to add a muzzle device to their handguns. These devices could include compensators, muzzle brakes, and suppressors. The easiest way to add one is via a threaded barrel.

Scroll down to see the best SIG P320 threaded barrels available on the market today.

Comparison of the Best SIG P320 Threaded Barrels

  • Non-Reflective Black Nitride Finish
  • Perfect for Use With Sound Suppressors
  • Best Threaded Barrel for the Full Sized P320
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  • Durable Nitride and Tin PVD Coating
  • Aesthetically Pleasing Gold Color Design
  • Best Compact Threaded Barrel for Sig P320
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  • Best 9mm Threaded Barrel for Sig P320
  • Flame Fluted Barrel for Improved Performance
  • Increases Barrel Length by 1 Inch for Better Performance
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What to Watch For When Buying a Threaded Barrel

There are a few things to take into consideration while deciding on which threaded barrel to buy. A lot of this depends on your own personal needs and what sort of shooting you do. Always take stock of your needs and the types of shooting situations you most often find yourself in or want to be the most prepared for.

Not every shooter would benefit from a threaded barrel so it is wise to take stock of those things before beginning the shopping process. If you do proceed, use the information below to help guide your search.

This Section Written By: Brian Belko

Expert Author

Brian Belko: Gunmann Author

Brian is an experienced freelance writer and technical writer who has previously written for publications such as Wide Open Spaces, Bigfoot Gun Belts, Alien Gear Holsters, and Kampgrounds of America. He brings both a passion for writing and a love of the outdoors to his published content.

Aside from writing and the outdoors, Brian enjoys gardening, being a co-host on The Nostalgia Blast Podcast, and learning to code.

Adding Suppression

One of the main reasons for adding a threaded barrel to a Sig P320 pistol is to allow for the addition of a suppressor. This cannot be done without a threaded barrel.

Before making this decision to upgrade your barrel, it is vital that you do plenty of research into what it takes to legally own and use a suppressor in your area. This varies by location and changes with time so there isn’t room in this article to cover it. Just make sure you understand the legality and the process before buying a threaded barrel.

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Other Muzzle Additions

All that about suppressors being said, that is not the only reason to add a threaded barrel to your Sig Sauer P320 handgun. Other muzzle devices such as compensators and muzzle brakes can also be added quickly and securely to a threaded barrel. They are both good options for shooters looking to reduce muzzle rise and felt recoil. Even just the added weight of the muzzle device can help offset muzzle rise while shooting.

Holster Considerations

The beauty of a threaded barrel is that attached muzzle devices can be removed fairly easily. That means you can always decide to only use them when wanted or when necessary. One important thing to keep in mind is that even without a muzzle device attached, a threaded barrel will add some length to the end of your pistol. This could render some holsters unusable especially for concealed carry. If you are hoping to pull double duty with your Sig P320, make sure to keep this in mind so you won’t be surprised if your current holster runs into problems.

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Speed and Protection

Longer barrels tend to make for faster bullet velocities in pistols. The additional length of a threaded barrel can add a bit of speed to your bullets. While the benefit might not be monumental, it is still an improvement. If you do upgrade to a threaded barrel, make sure it comes with a thread protector that will keep your threads in good shape when a muzzle device isn’t attached.

Review of the Best Sig P320 Threaded Barrels

Adhering to the aforementioned features of an ideal Sig P320 threaded barrel, we have come up with some of the best barrels on the market. These are the most feature-packed and positively reviewed barrels, and will definitely suit your budget. 

Best Overall

Silencerco – SIG P320 Threaded Barrel 9mm 1/2-28

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What Recent Buyers Report

The barrel works exceptionally well for the Sig P320 as well as for P250. It fits wonderfully and is quite easy to install. The assembly might require a bit of adjustment, but that’s just a minor issue. The threaded cap is also quite helpful with protecting the threads when not in use.

Why it Stands Out To Us

The barrel has been manufactured by Silencerco, which is also a renowned manufacturer of silencers. The barrel has a nitride finish, which makes it easy to clean and also highly resistant to wear and tear. Plus, it is available for both full size and compact P320 models.

Who Will Use This Most

The barrel is perfect for people who like to spend more time at the range with silencers on. Due to its impeccable nitride finish, the barrel is also good for EDC, without a suppressor installed with it. It is also ideal for people who undergo tactical shooting classes.

What Could Be Improved and Why

The barrel is compatible with Sig P320 compact and full-size models, as well as the P320. However, it does not fit the Sig P320 M17 and the Sig P320 X5 models, due to their design and size constraints respectively. So be sure to keep an eye out for that.

Bottom Line

The Silencerco barrel is a good replacement for your factory-installed barrel. It has an aesthetically pleasing nitride finish, and works exceptionally well with silencers.


Aesthetically Pleasing

1:10 Twist Rate For Accuracy

Comes With a Thread Protector

Easy To Install and Easy To Clean

Nitride Finish On the Outer Surface


Non-O-Ring Thread Cap

Does Not Fit the X-35 Model

Best Compact Threaded Barrel

Faxon SIG Sauer P320 Compact Threaded Flame-Fluted Barrel

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What Recent Buyers Report

The barrel features impeccable quality of manufacturing and has tight tolerances when installed in the weapon. It shoots flawlessly, and also suits the lightweight and compact Sig P320 due to its flame-fluted design. The muzzle end of the barrel also doesn’t stick out too much from the frame. So it doesn’t create holstering, comfort or concealment issues for the user.

Why it Stands Out To Us

The major factors as to why we included it in our list are aesthetics, durability and ergonomic design. The coating over the barrel is not only attractive, but it imparts exceptional wear and corrosion resistance to the barrel. Plus the reduction in weight due to fluting also helps with convenient handling.

Who Will Use This Most

The barrel will obviously be used by EDC users with the Sig P320 compact. The design and finish of the barrel eliminate the chances of any feeding and reliability issues, whatsoever. Plus it is also good for training since the conventional rifling works very well for cast ammunition.

What Could Be Improved and Why

The barrel could be shortened just a little. By approximately 0.5 inches to be exact. So it shouldn’t create any holster issues, since the barrel is to be used with a compact weapon. Plus the chamber isn’t marked with the caliber, which can be an issue for people using conversion kits.

Bottom Line

This Sig P320 barrel has an eye-catching appearance and a durable build to withstand the test of time. The fluting helps with handling the weapon and the knurled thread cap is quick and easy to remove. A great addition for EDC and CCW users.


Gold Finish Looks Amazing

Flame Fluted Barrel For Better Performance

Knurled Thread Protector With Gold Coating

Salt Bath Nitride Finish On the Inside For Lesser Friction

Conventional Rifling – Fully Compatible With Cast Bullets

Super Titanium Nitride (TiN) PVD Coating For Extreme Wear Protection


Priced On the High End

Not Marked/Stamped For Caliber

Finish is Quite Shiny, Especially Under Sunlight

Best 9mm Threaded Barrel

SIG P320 Fullsize Threaded Flame Fluted Barrel, 9mm

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What Recent Buyers Report

The most pleasing and impressive factor of this barrel is its quality. The salt-bath nitride finish on both surfaces, along with the flamed fluting, makes the barrel more effective and aesthetically pleasing. Additionally, the simple installation and the extra length is also a definitive factor for choosing this barrel.

Why it Stands Out To Us

The barrel is an inch longer than the factory barrel, which helps with accuracy. Plus, the fluted design provides a reduction in weight and better cooling, so it can be used for quick shooting sessions. The thread protector is knurled, which offers a better grip while adding or removing it.

Who Will Use This Most

The barrel is ideal for tactical and competition shooters. Due to its light weight, extra length and better cooling characteristics, it allows more controlled, accurate, and quicker follow-up shots on the target. Additionally, the barrel is also ideal for self-defense. Good for both novice and pro shooters.

What Could Be Improved and Why

This barrel does not have much scope for improvement. However, the extra length does warn the user about probable holstering and concealment issues.

Bottom Line

This is an ideal 9mm barrel for the Sig P320. The fluted design improves the controllability of the shooter over the weapon, and allows for quick follow up shots. The barrel is approximately an inch longer than the OEM barrel which helps with accuracy. This barrel is ideal for competitive shooters.


Aesthetically Pleasing Design

Knurled Thread Protector For Easy Operation

Salt Bath Nitride Finish On the Inside and Outside

Simple Drop-In Installation, No Gunsmithing Required

Fluted Design For Reduced Weight and Faster Cooling

Longer Than Factory Barrel For Extra Velocity and Accuracy


Not Compatible With M17 Models

Longer Barrel May Cause Holstering and Concealment Issues

Victory First – Brownells Edition SIG Sauer Barrels

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What Recent Buyers Report

The barrels seem to appropriately meet the expectations of its users. The nitride coated finish imparts a stupendous appearance and the anti-glare coating does not disturb while shooting. The barrel fires flawlessly without any issues, and is extremely accurate at the maximum effective distance of the weapon.

Why it Stands Out To Us

The barrel has been created and designed under the supervision of a veteran and renowned tactical instructor, which adds to its credibility. Additionally, the barrel has been priced at a reasonable price point, so it adheres to every budget.

Who Will Use This Most

Preppers and tactical shooters will use this the most. The barrel allows you to mount muzzle devices, and is quite accurate itself. It is better to replace the OEM barrel with this piece, because of the added accuracy and shooting performance.

What Could Be Improved and Why

The barrel is not compatible with M17 models, and doesn’t support conversion kits. Which may be a drawback, in case you are trying to switch calibers. Otherwise, the barrel is just perfect as it is.

Bottom Line

The Victory first Sig P320 barrels are special Brownells edition barrels, and have been manufactured with sheer precision and quality control. Its sleek design and durable construction make it a very desirable replacement for the factory barrel.


1:10 Right-Hand Twist

Non-Reflective Black Nitride Finish

Drop-In Replacement For Full-Size Barrel

Consistent Shooting and Accurate Pistol Barrel

Designed By Renowned Tactical Trainer Matt Jacques


Not Available For Compact Model

Does Not Work As a Conversion Barrel

Faxon Firearms SIG Sauer P320 Fluted/Threaded 9mm

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What Recent Buyers Report

According to the recent user reviews, the barrel has been found to be of impeccable quality and flawless function. This is a full-sized barrel, and performs exceptionally well on the grounds of accuracy.

Why it Stands Out To Us

The PVD coating which imparts the aesthetically pleasing look to the unit is quite unique in this category of barrels. Plus the conventional coating makes the barrel useable with almost all kinds of ammunition, including lead cast. Additionally, the barrel is fluted and full sized to help with accuracy and velocity of the emerging bullets.

Who Will Use This Most

Since this is a full-length barrel, it is more likely to be used for EDC and training. The barrel is of high enough quality to be used in competition, however, that’ll depend on the personal discretion of the user. People who like to show-off their firearms can also use the appearance of this barrel to their benefit.

What Could Be Improved and Why

Since this is a full-sized barrel, the threading on the muzzle end adds to the overall length, which might cause holster issues. So you must choose an appropriate holster with some extra space or an open-end to accommodate your firearm comfortably.

Bottom Line

This barrel from Faxon is loaded with features, and delivers the best value for your money. The conventional rifling won’t limit you to a specific kind of ammo. Plus the appearance and finish of the barrel is really something to brag about.


Durable Black Nitride Finish

Offers Good Value For Money

Better Than factory Tolerances

Button Rifled With Conventional Rifling

Made From Stress Relieved 416-R Steel

PVD Coating For Extremely Unique Look


Does Not Fit the X5/M17 Variant

Best X5 Threaded Barrel

Brownells – SIG P320 9mm Full Size Barrels

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What Recent Buyers Report

The feature most liked by users of this barrel is its compatibility with the X5 platform. Additionally, the conventional rifling does add to the velocity and range of the round. This is a full-sized barrel and is good for self-defense and EDC.

Why it Stands Out To Us

The most admirable features of this barrel are its build quality and rifling. The barrel is compatible with other Sig P320 variants (with maybe some modifications), and has been priced very well to suit even the lowest budget.

Who Will Use This Most

The barrel is ideal for target shooters and EDC people. This is a full-sized barrel and shoots accurately over the maximum range of this weapon. Thus making it good for self-defense situations. Additionally, it is also ideal for target practice and teaching amateur shooters the basics.

What Could Be Improved and Why

The barrel has conventional rifling which does add to its performance, but is also time-taking to clean. Plus, the package does not include a thread protector, so you have to search and buy one separately.

Bottom Line

This Sig P320 barrel has been exclusively designed by Brownells. It is a full-sized barrel with conventional rifling, quality coating and a suitable price tag for every pocket. Threaded barrels compatible with the X5 models are quite hard to come by, and this is the best of them.


Works With the X5 Model

Sturdy and Durable Construction

Nitride Treated For Corrosion Resistance

Properly Inspected and Treated For Quality

11 Degree Target Crown For Muzzle Protection

The Conventional Rifling Offers a Bit Of Extra Velocity For the Projectile


Doesn’t Include the Thread Protector Cap

Takes Time and effort For Cleaning Due To Conventional Rifling

What is a Threaded Barrel?

A threaded barrel is a barrel that has been engraved with threads on the forend to accept muzzle devices. Threaded barrels are extremely common in rifles and carbines. However, they are also used with handguns for mounting accessories like compensators and silencers. 

Such barrels make your handgun more tactical, and improve its overall performance. Affecting factors such as noise, recoil, muzzle rise, and velocity. There are advantages and disadvantages to these barrels, which we will evaluate further in this article. 

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Are All Threaded Barrels the Same? 

For the basic design and function, almost all threaded barrels are the same. However, there are still structural and other differences in the barrel that affect the overall accuracy, shooting comfort, and durability of the weapon. 

Some major points of difference among the barrels included here are their coating, design, and aesthetics. 

Some barrels feature a nitride coating, while some have a chrome lining. A couple of barrels are also fluted for better cooling and symmetric reduction in overall weight.

Pros and Cons of Threaded Barrels

Before you get a threaded barrel for your Sig P320, consider reading these pros and cons. It will help you assess your needs and in making the right decision.


Here are the main pros of threaded barrels:

Add Muzzle Device

A threaded barrel allows you to mount a muzzle device such as a compensator or silencer to your weapon. Silencers can be helpful if you are noise sensitive, or are shooting your weapon in an echoing indoor range. 

Decrease Muzzle Rise

Adding a muzzle device increases the forend weight of the handgun. This helps with overcoming muzzle rise under the influence of recoil. Especially when shooting .45 ACP and .40 S&W rounds. 

Might Improve Velocity 

A threaded barrel is approximately half an inch longer than non-threaded barrels. This slight increase in barrel length affects and improves the velocity of the bullet.

According to a gross estimation, this value is about 25 fps per inch of barrel change. So you’ll get a staggering 12 fps increase in velocity.

Faxon SIG Sauer P320 Compact Threaded Flame-Fluted Barrel


Below are the main cons of threaded barrels:

Legal Implications

Many states don’t allow the use of threaded barrels or muzzle devices, or at least require you to declare and register such upgrades. 

Not Used Often

Most Sig P320 owners will probably never use a muzzle device with their weapon. Most people consider this as a novelty add-on and don’t find it very useful. 

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Holster Issues and Concealment

A threaded barrel sticks out a bit from the handgun frame. Which may cause holstering and comfort issues. Plus it could affect concealment, especially with muzzle devices. 


A threaded barrel allows the user to attach muzzle devices to the handgun. Such muzzle devices help with suppressing noise and reducing recoil. They also affect the weight and handling of the pistol. A good threaded barrel must be durable, with a resistant coating and precise dimensions to elevate the efficiency of a weapon. 

Michael Lutes

Michael Lutes is the managing editor and owner at Gun Mann. He is a veteran, gun enthusiast, 3 gun competitor, and 2a advocate. Mike has a passion for innovation and education across the industry to create great content, training, and insights from the best and brightest.

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