Since the M17 variant of the Sig P320 was adopted as the default sidearm by the US Military, it acquired a lot of reputation and support. It is an incredible weapon, but it can be improved to achieve higher standards of success. The threaded barrel is one such improvement.
We’ll get further into the idea of threaded barrels with a Sig P320, as well as the benefits and drawbacks of doing so.
We’ll even go through the best threaded barrels for the Sig P320 on the market so you can choose the one that’s perfect for you.
What is a Threaded Barrel and how does it work?
A threaded barrel is one that has had threads carved on the forend in order to accept muzzle devices. Rifles and carbines with threaded barrels are highly popular. They are also used to install attachments such as compensators and silencers on firearms.
These barrels increase the overall efficiency of your pistol and make it more tactical. Noise, recoil, muzzle drop, and velocity are also influencing variables. These barrels have benefits and drawbacks, which we will discuss more in this report.
Is There A Difference Between Threaded Barrels?
Almost all threaded barrels have the same basic design and purpose. However, structural and other changes in the barrels have an effect on the weapon’s overall precision, firing ease, and reliability.
The coating, architecture, and aesthetics of the barrels featured here are some of the most notable differences.
Some barrels are coated in nitride, while others have a chrome covering. A pair of barrels are also fluted for improved ventilation and symmetrical weight loss.
The Benefits and Drawbacks of Threaded Barrels
Consider these advantages and disadvantages when purchasing a threaded barrel for your Sig P320. It will assist you in determining the requirements and making the best judgment possible.
The below are the major advantages of threaded barrels:
Adding a muzzle system.
A threaded barrel enables you to attach a muzzle system to your firearm, such as a compensator or silencer. Silencers may be useful if you are susceptible to noise or if you are firing in an echoing indoor range.
Reduce the rise of the muzzle
The addition of a muzzle system raises the handgun’s forend weight. This aids in the reduction of muzzle rise caused by recoil. Particularly when it comes to shooting. 45 ACP and.40 S&W rounds.
It Has the Potential to Increase Velocity
A threaded barrel is almost half an inch longer than a barrel that is not threaded. The bullet’s velocity is affected and improved by the small rise in barrel duration.
This value is roughly 25 fps per inch of barrel transition, according to a rough estimate. As a result, the velocity would rise by a whopping 12 frames per second.
The below are the major disadvantages of threaded barrels:
Many states prohibit the usage of threaded barrels or muzzle systems, or at the very least mandate that such upgrades be declared and recorded.
It is not often used.
The majority of Sig P320 owners would almost certainly never use a muzzle system on their firearm. The majority of citizens regard this as a novelty feature that isn’t really useful.
Issues with holsters and concealment
A threaded barrel protrudes from the pistol frame a little. This could result in holstering and comfort problems. Furthermore, it can have an impact on concealment, especially while using muzzle devices.
What to Look For When Buying a Threaded Barrel for Your Sig P320
Before you buy a threaded barrel, you can think of a few things. A barrel with the right combination of these qualities will be both sturdy and powerful.
Complete the task.
A good finish is needed on both the inside and outside of a barrel. The barrel will last longer and will be easier to clean and maintain as a result of this. Nitride and chrome are the two popular types of coatings.
The twist rate, which influences the weapon’s precision, is highly influenced by proper rifling. The button or 5R pattern is used to rifle most barrels these days. As a result, keep an eye out for it.
The optimal distribution of weight in a fluted barrel allows for effective cooling and a decrease in the weapon’s total weight. A fluted barrel is unquestionably more powerful than one that isn’t. Especially with small frames.
Since you won’t be using a muzzle kit on your threaded barrel in most cases. It is preferable to choose a barrel that has a thread cover. On the other hand, you can buy one individually if you want.
Ranking: Best Sig P320 Threaded Barrels
We’ve reviewed some of the best barrels on the market by adhering to the above characteristics of an ideal Sig P320 threaded barrel. These are the barrels with the most features and favorable reviews, and they would certainly suit your budget.
Best Sig P320 Threaded Barrels: SIG SAUER P320C 9MM THREADED BARREL
- Easy Installation
- 1:10 Twist Rate for better reliability
- Finish with Nitride for protection
- There is not a O Ring Thread Cap
Last Buyers’ Experiences
The barrel performs admirably in both the Sig P320 and the P250. It looks great and is easy to put together. It’s possible that the assembly may need some adjustments, but that’s a minor problem. When not in usage, the threaded cap is often useful for securing the threads.
Why we recommend it
SIG Sauer, a well-known maker of silencers, produced the barrel. The barrel is finished with a nitride finish, which is simple to clean and very resistant to wear and tear. It’s also compatible with both full-size and small P320 versions.
Who should buy it
The barrel is ideal for those who want to invest some time at the range when wearing silencers. The barrel is also suitable for EDC without a suppressor, thanks to its flawless nitride finish. It’s also perfect for anyone taking tactical shooting courses.
What, if anything, should be improved, and why?
The barrel fits both the compact and full-size Sig P320 variants, as well as the P320. The Sig P320 M17 and Sig P320 X5 variants, however, do not work due to style and size restrictions, respectively. So keep your eyes out for that.
The SIG SAUER P320C 9MM THREADED BARREL is a suitable improvement when exchanged with the barrel that came with your rifle. It has a nitride finish that is aesthetically appealing and fits exceptionally well with silencers.
2nd Best SIG P320 Threaded Barrels : SIG SAUER 9MM 4.7″ BARREL
- Great Accuracy with this barrel installed
- Replacing a Full-Size Barrel with Drop-in
- Nitride Finish
- Not to be used as conversion
What the Buyer reported
The barrels seem to satisfy the consumers’ needs in a meaningful manner. The nitride coating gives the barrel a stunning look, and the anti-glare coating keeps the barrel from glare when firing. The barrel shoots flawlessly with no problems and is highly precise at the weapon’s highest effective range.
Why we recommend it
The barrel was developed and built under the guidance of a seasoned and well-known tactical instructor, adding to its reputation. Furthermore, the barrel is reasonably priced, so it fits within every pocket.
Who should buy this barrel
This would be most useful to preppers and advanced gunmen. The barrel is accurate and allows for the mounting of muzzle weapons. Because of the improved precision and shooting efficiency, it is preferable to substitute the OEM barrel with this one.
What can be improved
The barrel is not compatible with M17 versions, and conversion kits are not available. If you’re looking to swap calibers, this may be a disadvantage. Aside from that, the barrel is fine as is.
The SIG SAUER 9MM 4.7″ BARREL, BLACK are Sig Sauer barrels made with extreme accuracy and quality control. The compact appearance and long-lasting construction render it a great alternative to the factory barrel.
3rd Best SIG P320 Threaded Barrels: SIG SAUER 9MM 3.9″ BARREL
- Good price – performance ratio
- Made with 416-R Steel
- Military grade
- No Fit for the X5/M17
What the latest Buyers reported
The barrel has been found to be of impeccable reliability and flawless work, according to recent user feedback. This is a semi-sized barrel that shoots very good in terms of precision.
Why we recommend it
In this type of barrels, the PVD coating that gives the device its attractive appearance is very peculiar. Furthermore, the barrel’s traditional coating allows it to be used for virtually every kind of ammo, even lead cast. The barrel is often fluted and full-sized, which aids in the precision and velocity of the emerging projectiles.
Who should buy it
Since it’s a full-length barrel, it’ll be used mostly for EDC and practice. The barrel is of sufficient consistency to be used in competition, although it would be up to the user’s discretion. People who want to flaunt their guns will profit from the presence of this barrel.
What, if anything, should be improved, and why?
Since this is a semi-sized weapon, the muzzle end threading contributes to the total length, potentially causing holster issues. As a result, you’ll need to select a holster with a tight fit or an open-end holster to easily carry your handgun.
This SIG SAUER 9MM 3.9″ BARREL is jam-packed with features and offers excellent value for money. Traditional rifling would not restrict you to a single type of ammunition. Furthermore, the barrel’s appearance and finish are truly impressive.
4th Best SIG P320 Threaded Barrel: SIG SAUER 9MM 3.6″ BARREL
- Great performance
- Inside Nitride Finish for lesser Bullet friction
- Compatible with Cast bullets
- Finish might be a little shiny
What the Buyers reported
The compatibility of this barrel with the X5 platform is the aspect that users like the most. Furthermore, the traditional rifling improves the round’s velocity and range. This is a short-sized barrel that can be used for self-defense or everyday carry.
Why we recommend it
The rifling and design efficiency of this barrel are its most admirable qualities. The barrel is compatible with other Sig P320 models (with minor modifications) and is reasonably priced to fit even the most limited budget.
Who should buy it
Aim shooters and EDC users can appreciate the barrel. This is a full-sized barrel that fires reliably over the weapon’s maximum range. As a result, it’s useful in self-defense cases. It’s also great for target practice and teach the fundamentals to new shooters.
What can be improved?
The barrel has traditional rifling, which improves consistency but takes a long time to clean. Furthermore, the kit does not contain a thread protector, so you’ll have to go out to get one.
SIG SAUER produced this Sig P320 barrel specifically for it. It’s a small-sized barrel with traditional rifling, high-quality finish, and an affordable price tag. The finest threaded barrels for the X5 variants are hard to come by, and this is one of the best of them.
5th Best SIG P320 Threaded Barrel: BROWNELLS – SIG P320 9MM FULL SIZE BARRELS
- Simple design
- Made in the US
- Nitride-treated for corrosion resistance
- No thread protector
What the Buyers reported
When mounted on the rifle, the barrel has an excellent design and tight tolerances. It shoots flawlessly and, thanks to its flame-fluted nature, it even suits the lightweight and portable Sig P320. The barrel’s muzzle end often doesn’t protrude too far from the picture. As a result, there are no problems of holstering, comfort, or concealment for the customer.
Why we recommend it
Aesthetics, longevity, and ergonomic style are the main reasons we put it on our list. The coating on the barrel is not only desirable, but it also provides the barrel with excellent wear and corrosion protection. Furthermore, the weight loss caused by fluting aids in easy handling.
Who should buy it
EDC consumers of the Sig P320 compact will undoubtedly need the barrel. The barrel’s shape and finish remove any and all risks of feeding and durability problems. It’s also useful for practice, since traditional rifling fits great for cast ammo.
What can be improved?
The muzzle should be rendered a little shorter. By around 0.5 centimeters, to be precise. Since the barrel is designed to be used in a lightweight pistol, it shouldn’t cause any holster problems. Furthermore, the chamber is not labelled with the caliber, which may be problematic for those that use conversion kits.
This Sig P320 barrel has a striking design and a solid construction that can bear the test of time. The fluting aids in arms handling, and the knurled thread cap is simple to cut. This is an excellent improvement for EDC and CCW consumers.
The most important terms on the subject of threaded barrels
If you want to clean your gun properly, you should know the relevant components and their functions. The knowledge of the gun owners varies partly very strongly, likewise some designations differ depending upon kind of weapon or also regionally.
Therefore, in this chapter we have listed a small overview of the most important weapon components and terms for you – together with short descriptions of their functions and peculiarities.
Fields and rifling
In order to give a projectile the necessary spin to build up a stable, tumble-free trajectory when fired, “spiral”, actually helical, indentations are made in the interior of a rifled barrel. These are called fields and rifling – rifling being the grooves, fields correspondingly being the raised areas between the rifling. The inside diameter of a barrel can be specified as the rifling dimension (mark B) or rifling caliber, or as the field dimension (mark A) or field caliber.
The rifling dimension is the distance between two opposing rifling sections, while the field dimension is the distance between two opposing fields. The rifling dimension is therefore always greater than the field dimension.
The diameter of the bullet – which is also often found in the caliber – usually corresponds to the rifling diameter. When the gun is fired, the bullet is slightly squeezed through the barrel and receives a characteristic scratch mark pattern, which allows it to be assigned to the corresponding barrel.
Because hand perspiration has a pH of between 4.7 and 5.75 and is therefore slightly acidic, it can etch fingerprints into metallic surfaces, known as fingerprints or fingerprint corrosion. Even so-called “rust-free” stainless steel is sometimes susceptible to this form of etching if the metal is not appropriately protected – in fact, “rust-free stainless steels” are more likely to be “rust-bearing” because they too are susceptible to rusting under certain conditions. Especially in the field of gun care, it is therefore advisable to protect the metallic parts of the gun in order to prevent this form of corrosion.
Here, however, it is important to distinguish between alkaline gun oils, such as Ballistol Universal Oil, which actually chemically neutralize this hand sweat, and other products that merely dilute the hand sweat – in the hope that this will render it harmless. While some products advertise statements such as “neutralizes hand sweat,” they are not chemically capable of doing so at all, as they are not alkaline oils, but neutral oils (e.g., Brunox, SchleTek, FlunaTec).
In order for the projectiles to adapt to the Best SIG P320 Threaded Barrels, absorb the twist and not damage the barrel, they are made of soft metals such as soft iron, bronze (softer than brass), brass, copper, zinc or lead, or have an appropriate coating. Therefore, when a gun is fired, metal residues of the softer metal of the projectile remain in the barrel. This is referred to as bullet lubrication.
Smoothbore shooting and bullet insertion
Both smoothbore shooting and bullet insertion are actually self-evident, but are nevertheless unfortunately often neglected – although both are sometimes very important. The so-called smooth shooting is not absolutely necessary, but you will benefit from it later when cleaning the barrel. The background to this is that the surface inside the barrel is slightly rough due to the way it is manufactured. This is more pronounced in industrially manufactured barrels than, for example, in high-quality match barrels. This roughness can be reduced by smoothing the barrel. And the smoother the barrel, the less opportunity there is for dirt to adhere and the easier it is to clean later. Especially with jacketed bullets, smooth shooting is a profitable preliminary work; with other ammunition choices, for example .22 LFB (pure greased lead bullets), it can be confidently dispensed with.
In order to shoot a new Best SIG P320 Threaded Barrels smoothly, it is chemically cleaned before the first shot. Residues from the production, the official proofing or the firing are removed in this way. Robla Solo MIL Barrel Cleaner is ideally suited for this purpose. After this cleaning step, the first shot can be fired, immediately followed by cleaning again – a felt wetted or soaked with Robla Solo MIL is completely sufficient for this. This procedure, shot and subsequent cleaning, is repeated 5 times.
Now 2 shots are fired and again chemical cleaning is performed with wetted or soaked felt. This interval is also repeated 5 times. In the next step, cleaning is first performed after 5 shots, followed by 10 shots. To be absolutely sure, another pass with 15 shots can be made. By then, at the latest, the new barrel will be optimally smooth-shot and easier to clean in the future. Whether or not the rifle needs to be re-fired after cleaning depends on a variety of factors, but the following applies: Whenever the scope has been removed for cleaning, it should be re-fired. And whenever you feel the point of impact has changed, a check shot should be taken.
Cleaning the Riflescope – A myth?
Almost every gun owner knows stories from his or her environment about guns that have been “broken cleaned” by their owners or previous owners. But are these reports really true or are they just old wives’ tales?
The fact is: Regular cleaning and care of a well-functioning firearm is essential and – as long as it is carried out professionally – cannot damage the firearm. But this is where the problem often lies: if unsuitable cleaning agents are used or the wrong materials are used when cleaning the gun, the gun can of course be damaged in the process. And because the person responsible is not aware of his mistakes, the myth of “cleaning for damage” is put forward.
One of the most common mistakes is that a wire or steel brush was used and due to the high hardness of the bristles the fields and rifling were damaged. For this reason, steel brushes should not be used. Instead, only soft brushes made of brass or bronze (e.g., from Raetz, Eyselein, or Niebling) should be used, which fit the corresponding caliber exactly. And these should also only be used in one direction, ideally from the chamber to the muzzle. With revolvers or closed systems, cleaning must be done from the muzzle to the chamber. Therefore, special care must be taken here with the cleaning rod so as not to damage the muzzle.
Tow, patches made of cotton or microfiber or, optimally, felt cleaner and intensive cleaner felt with fine brass fibers are also ideally suited for cleaning. It should also be noted here that these are always pulled through completely, then removed and the cleaning is then repeated from the same side. If this is not observed, the dirt will only be distributed instead of removed. It is often advisable to twist several cleaning felts together. This increases the contact area of the felts.
Another source of error that can permanently damage the Best SIG P320 Threaded Barrels are cheap cleaning rods made of bare steel or with a defective plastic coating. Here, of course, the hard, bare metal can damage the barrel – especially the muzzle area and the cartridge chamber, which are particularly important for marksmanship. It is also important to ensure that the cleaning rod handle is mounted on ball bearings or plain bearings and can rotate with the fields and rifling during cleaning. Otherwise, it will scrape over the fields and damage their edges.
Corrosion (from Latin corrodere, “to gnaw”) is the reaction of a material with its environment that leads to a measurable change in the substance.
The best-known form of corrosion in metals is rusting, which is the oxidation of iron. Rust occurs when iron or steel oxidizes with oxygen in the presence of water. In contrast to the protective oxide layer of many metallic materials such as chrome, aluminum or zinc, rust forms a sessile, rough layer on iron that does not protect against further decomposition. Rust has basically no place on a weapon.
Pitting corrosion, also known as pitting, is the term used to describe areas of corrosion that appear small and usually punctiform on the surface, but expand trough-like in depth. In other words, the actual damage caused by the corrosion is much greater than can be seen on the surface. This is why pitting corrosion often goes unnoticed for a long time.
The term lidation describes the behavior of a cartridge case in the chamber when the gun is fired. Then the pressure of the burning propellant powder causes the material of the cartridge case to nestle against the wall of the chamber, thus acting as a gas-tight seal at the rear end of the Best SIG P320 Threaded Barrels. However, a prerequisite for optimum lidding is that the cartridge chamber be absolutely free of oil and grease.
An oil shot or cleaning shot is the first shot fired from a gun barrel that has not been de-oiled. The normal point of impact is more or less affected by the film of oil that the projectile drives on its way through the barrel. How useful or harmful such a cleaning shot is remains controversial: In general, the gun barrel should be pulled through dry before use.
However, this also removes the rust protection, so that depending on the application and weather conditions, slight flash rust can occur – for example, if a hunter is sitting for a long time. If the after-treatment is forgotten after the weapon has been used, this can lead to pitting corrosion. Nevertheless, of course, one cannot recommend a cleaning shot to any hunter, as this would mean that he would scare the game away with his oil shot.
Since every weapon behaves differently and the necessity of an oil shot is also related to the individual use of the weapon, the question “Oil shot yes or no?” cannot be answered universally.
However, every shooter should know the deviation of the point of impact due to the oil shot for his weapons. So test them consciously at the shooting range. Because under the same conditions – i.e. with a constant type of cleaning and minimum amount of oil used – the deviation of the point of impact position can be reproduced. For this purpose, a well-known Lower Bavarian gunsmith has carried out extensive tests.
In any case, however, before the first shot, the Best SIG P320 Threaded Barrels should be pulled dry once again to prevent too much oil residue in the barrel from causing problems during the cleaning shot – up to and including permanent barrel damage. With a normally maintained rifle, a wafer-thin film of oil remains in the barrel despite dry drawing, so that it is sufficiently protected against flash rust. However, it is essential to ensure that the cartridge chamber is dry. Oil and grease in the chamber can not only affect the point of impact, but also lead to a greatly increased breech load due to a lack of liner.