Common Sig M400 Tread Problems and Their Solutions

The Sig Sauer M400 Tread is a popular AR-15 rifle designed for enthusiasts and shooters who demand high performance and reliability. However, like any mechanical device, the M400 Tread is not immune to problems.

Sig M400 Tread problems

This article will discuss some common issues that M400 Tread owners have experienced and their potential solutions.

Some common issues people may reported with sig M400 tread are Misfires, Jamming problems, Failure to Extract, Charging Handle Locking, Poor Accuracy, Excessive Recoil, Loose or Loose or wobbly stock.

By understanding these problems and how to fix them, M400 Tread owners can ensure that their rifle remains in top condition and operates flawlessly.

Common Sig M400 Tread Problems and Their Solutions

The most common problems with the SIG M400 Tread rifles are jamming issues, charging handle locking, accuracy issues and design issues.

1. Misfires

The Sig Sauer M400 is known for its reliability and accuracy, but unfortunately, it may sometimes suffer from misfires in certain situations. Various factors, such as a worn or damaged firing pin, weak ammunition, incorrect gas settings on carbine models, or a dirty chamber, can cause this.

To prevent misfires on your M400, there are several steps you should take.

First, ensure that your ammunition is compatible with the weapon. Inspect the firing pin for signs of wear or damage; replace the pin before shooting. It’s also critical to clean the chamber thoroughly after each use to ensure that all residue from past rounds has been removed.

Finally, ensure the gas system is correctly adjusted for optimal performance; improperly adjusted gas systems can lead to consistent misfires and over-gassing issues.

2. Jamming Problems

Jamming is one of the most common issues owners of Sig m400 rifles face. This problem can be caused by several factors, including a dirty chamber or magazine, poor-quality magazines, weakened recoil springs, improper ammunition selection, or an overly tight gas block. An incorrect gas port size can also cause it.

To prevent jamming problems from occurring in your Sig m400 rifle, it is important to perform regular maintenance on the gun and ensure that all components are kept clean and in good working order. Additionally, use high-quality magazines and quality ammunition for best results.

It is also important to ensure your gas system is set up correctly with the appropriate gas port size for your ammunition. Replace worn-out parts, such as recoil springs or the gas block, before going to the range.

If you do experience jamming issues with your Sig m400 rifle despite following these guidelines, it may be necessary to take it into a qualified gunsmith for further inspection and repair.

Technology advancements have made this repair relatively easy and inexpensive compared to fixing it yourself without knowing exactly what’s wrong.

3. Failure to Extract

Failure to extract occurs when the spent casing that is ejected after firing becomes stuck in the chamber of your firearm.

This can happen due to various factors, including improper cleaning and maintenance, an over-lubricated gun, or even a faulty bolt carrier group. Whatever the cause, if left unaddressed, this problem can lead to serious malfunctions and accidents.

To solve this issue, it’s important first to identify the source of the problem. A thorough cleaning of your weapon should be performed for you to properly inspect the internals and determine what may be causing the failure to extract.

Additionally, it’s recommended that you use high-quality lubricants on any parts that require lubrication, as these will help reduce friction and make extraction smoother.

Finally, if necessary, you may need to replace certain components, such as an old or worn out bolt carrier group (BCG).

If these steps do not fix the issue or if problems persist after taking them, more extensive maintenance or repairs may be needed for your gun to function properly again.

4. Charging Handle Locking

The Sig Sauer M400 charging handle locking mechanism is designed to keep the bolt carrier in place securely while firing. Unfortunately, this locking mechanism can sometimes become loose or completely fall off due to wear and tear. This can prevent the user from being able to chamber rounds, ultimately compromising their safety safely.

Fortunately, most users can quickly and easily fix this problem by simply adjusting the charging handle. The key is to ensure the charging handle is tight enough when pulled back for it to stay in place and prevent malfunctions.

To do this, use a flathead screwdriver or Allen key and loosen the two screws on either side of the rear of the receiver. Once loosened enough, grab the charging handle firmly with one hand while using your other hand to manually tighten down each screw until they are snug but not overly tight.

Doing so will ensure that your charging handle stays in place and gives you peace of mind knowing it won’t fail during operation.

If done correctly, adjusting your Sig Sauer M400’s charging handle should resolve any issues you may have been experiencing with its locking mechanism.

5. Poor Accuracy

The M400 features an improved barrel to help ensure optimal accuracy and an adjustable gas block and free-floating handguard. With a 16” barrel and 1:7 twist rate, this rifle is designed to maximize shooting stability.

The M400 allows users to customize their sight selection, ranging from iron sights to magnified optics. This gives shooters various options when looking for the best accuracy possible.

Additionally, the Mil-Spec trigger provides unparalleled precision, allowing for precise and consistent shot placement even at long distances.

Despite its potential for improved accuracy when compared with other rifles, some users may still find that the Sig Sauer M400 fails to meet their expectations in terms of accuracy.

There are several reasons why this may be the case; one common issue is that the barrel on the M400 can become fouled easily if not properly maintained and lubricated after each use. An incorrect zero can also lead to subpar performance in terms of accuracy.

To ensure your Sig Sauer M400 performs at its peak potential in terms of accuracy, it’s important to take extra steps in its proper maintenance and cleaning. It’s also essential to ensure your sights are properly zeroed before hitting the range—this will help you get off tight groupings right out of the gate!

Lastly, it’s always a good idea to use high quality ammunition when sighting in your rifle; higher grade ammo produces better results than lower grade rounds regarding overall accuracy.

6. Excessive Recoil

Excessive recoil with a firearm can be a frustrating and potentially dangerous problem. Recoil occurs when the firearm discharges, and the force of the discharge pushes the firearm and the shooter’s body back. If you are experiencing excessive recoil with your Sig m400 Tread, there are several things you can do to address this issue.

The first thing to check is your shooting technique. Proper shooting technique can help reduce the amount of recoil the shooter feels. Ensure you hold the firearm correctly and that your stance is stable and balanced.

Another factor that can affect recoil is the ammunition you are using. Higher-powered ammunition will produce more recoil than lower-powered ammunition, so consider switching to lower-powered ammunition if you are experiencing excessive recoil. Additionally, the weight of the bullet can affect the recoil, with heavier bullets producing more recoil than lighter ones.

The muzzle device on your Sig m400 Tread can also play a role in the amount of recoil you experience. Consider adding a muzzle brake or compensator to your firearm to help reduce recoil.

The buffer system of the firearm can also affect the recoil. Ensure that the buffer is the correct weight for your firearm, as using an incorrect buffer can cause excessive recoil.

If none of these solutions resolve the issue, it may be best to take your firearm to a qualified gunsmith for further inspection and repair. They can help you identify any issues with your firearm contributing to the excessive recoil.

7. Loose or Wobbly Stock

A loose stock can cause the shooter to lose accuracy and control of the firearm, which can lead to dangerous situations. Fortunately, there are steps you can take to address this issue.

The first thing to check is the stock itself. Ensure the stock is properly attached to the buffer tube and that all screws and pins are tightened securely. If any screws or pins are loose, tighten them immediately. If any parts are damaged or missing, replace them promptly.

If the stock is properly attached and tightened, the problem may be with the buffer tube. Check that the buffer tube is in good condition and the correct size and type for your firearm. An improperly fitting buffer tube can cause the stock to become loose.

Another potential cause of a loose stock is a damaged or worn buffer spring. The buffer spring absorbs recoil and can become worn over time. A worn buffer spring may cause the stock to become loose or wobbly.

If none of these solutions resolve the issue, it may be best to take your firearm to a qualified gunsmith for further inspection and repair.

Tips to Avoid Common Issues With M400 Tread

Regular Cleaning and Lubrication: One of the most important things you can do to keep your M400 Tread functioning properly is to clean and lubricate it regularly. This will help prevent dirt, debris, and other contaminants from affecting the firearm’s performance.

Proper Ammunition: Using the correct ammunition is essential for properly functioning any firearm, including the M400 Tread. Make sure to use high-quality, appropriate, factory ammunition for your firearm.

Proper Storage: Proper storage is essential to keeping your firearm in good condition. Store your M400 Tread in a cool, dry place away from extreme temperatures and humidity. This will help prevent rust and other damage.

Check for Wear and Tear: Regularly inspect your firearm for signs of wear and tear. This includes checking for cracks, loose components, and other issues affecting the firearm’s performance. Address any issues promptly to prevent further damage.

Follow Manufacturer Guidelines: Always follow the manufacturer’s guidelines for maintaining and operating your M400 Tread. This will help ensure that you are using the firearm properly and safely.

Seek Professional Help: If you experience any issues with your M400 Tread that you cannot resolve, seek professional help from a qualified gunsmith.

What Does User Think About M400 Tread

Gun owners and enthusiasts have praised and criticized the Sig Sauer M400 Tread rifle. Those who like the rifle cite its lightweight design and versatility as major benefits, noting that the modular design of the rifle allows for easy customization to suit any shooter’s preferences.

However, some have complained about accuracy issues, particularly with the provided sights, and a lack of attention to detail in the craftsmanship. In addition, a few buyers have expressed concern that the quality control on this model is not up to par with other Sig Sauer rifles.

Despite these negative opinions, most users agree that it is a reliable and well-made firearm that offers excellent value for money.

Springfield Saint Victor Vs Sig Sauer M400 Tread

Here are some key differences between the Springfield Saint Victor and the Sig Sauer M400 Tread:

The Saint Victor has a longer barrel length of 16 inches compared to the M400 Tread’s 14.5-inch barrel.

The M400 Tread has a free-floating handguard, while the Saint Victor does not.

The M400 Tread comes with a Magpul MOE SL-K stock, while the Saint Victor comes with a Springfield Armory proprietary BCM Gunfighter stock.

The Saint Victor has a flat-faced trigger, while the M400 Tread has a standard mil-spec trigger.

The Saint Victor has an enlarged ejection port to enhance reliability and reduce malfunctions, while the M400 Tread has a standard ejection port.

Ultimately, both rifles are reliable, accurate, and high-quality firearms that are suitable for a range of shooting applications. The two choices will depend on individual preferences and needs, such as barrel length, stock options, trigger preference, and overall aesthetic appeal. Handling and shooting both rifles if possible is recommended to determine which is best for you.

Frequently Asked Questions 

Is the SIG M400 tread Reliable?

Yes, the SIG M400 Tread is a reliable firearm. It is made with quality materials and has a durable design that suits all shooting activities. The SIG M400 Tread is also highly accurate and has earned a reputation for its reliability and performance.

How far can the SIG M400 tread shoot?

The rifle can shoot accurately at distances of up to 150 yards.

Is Sig M400 tread gas or piston?

It is a gas-operated, semi-automatic rifle.

What is the meaning of manually/ hand cycling ammo?

Manually/ hand cycling ammo is a technique used by firearm enthusiasts. A round of ammunition is manually pulled from the magazine, chambered, and then ejected from the firearm by hand. This is done to ensure the firearm is properly cycling, which is essential for reliability and accuracy. It also allows for a more thorough inspection of the firearm and ammunition before use.

What is the twist rate on a SIG M400?

The twist rate on a SIG M400 is 1 turn in 7 inches.

What is the trigger pull on SIG M400?

The trigger pull on the SIG M400 is 4.5 to 5.5 pounds.


Fixing common SIG M400 tread problems can seem daunting, but by following the simple steps outlined in this blog post, it’s remarkably easy. Just remember to safety check the gun before and after making any adjustments.

Whether you want to drink MILK with your old noisemaker or re-bunk a new one, you have all the tools to ensure your SIG M400 is ready for whatever life throws at it. Happy shooting!