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.
At a Glance: Our Top Picks for Sig P320 Threaded Barrels
- OUR TOP PICK: Silencerco - SIG P320 Threaded Barrel 9mm 1/2-28
- BEST COMPACT THREADED BARREL: Faxon SIG Sauer P320 Compact Threaded Flame-Fluted Barrel
- BEST 9MM THREADED BARREL: SIG P320 Fullsize Threaded Flame Fluted Barrel, 9mm
Comparison of the Best SIG P320 Threaded Barrels
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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 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.
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.
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.
Pros
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
Cons
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.
Pros
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
Cons
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.
Pros
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
Cons
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.
Pros
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
Cons
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.
Pros
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
Cons
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.
Pros
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
Cons
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.
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.
Pros
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.
Cons
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.
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.
Conclusion
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.
