SIG SAUER M400 TREAD
Posted May 26, 2023
The SIG Sauer M400 Tread is a semi-automatic rifle that makes a significant contribution to the contemporary AR-15 market. This rifle has been designed with an unmatched combination of features, materials, and production accuracy, making it an ideal choice for competitive shooting, defense, hunting, and just about anything else that comes to mind. On top of that, the M400 Tread carries a price tag that won’t break the bank, making it an attractive option for anyone in the market for an AR-15.
The M400 Tread comes equipped with the direct impingement operating system, which is the classic design used in the AR-15. The gun’s gas system is calibrated to reduce down-range muzzle movement and improves accuracy with each shot fired. The rifle sports a 16-inch lightweight barrel with 5R rifling, which allows for consistent accuracy and increased velocity. Additionally, the barrel is constructed of durable hammer-forged steel and it has a black nitride finish to protect against corrosion, wear, and abrasion.
The M400 Tread's unique features start with its adjustable TREAD pistol grip. This grip is designed to be optimized to fit a wide range of hand sizes and gives the shooter improved comfort and control when shooting. The grip is also removable, allowing for a variety of custom aftermarket grips to be installed. Sitting atop the lower receiver is the M400 Tread’s free-floating M-Lok handguard that provides plenty of room for attaching accessories such as lights, lasers, and bipods. Additionally, it weighs in at just 8.9 ounces and has been hard anodized for an extremely durable finish.
On the upper receiver, there is the M400 Tread’s adjustable buttstock. This stock has five different positions, allowing the shooter to quickly adjust the length of pull depending on their size and shooting requirements. The stock is also collapsible for storage and transport, and its adjustable cheek rest even allows the shooter to get a custom fit while shooting.
The M400 Tread has a three-position selector switch that goes from safe to fire to released, so the shooter can set the gun to fire with the safety on for extra security. This allows the shooter to practice safe firearm handling without worrying about the gun being discharged when the safety is off. The trigger is a match-grade flat-foot single-stage trigger, which is designed to deliver a clean and consistent break with a crisp feel. The trigger has also been coated with nickel boron for an even smoother break.
The bolt carrier group is machined out of high-quality stainless steel and is heat treated for durability. The extraction system is designed to smoothly cycle rounds through the firearm, ensuring that no matter what kind of rounds you’re using, they will be reliably and accurately loaded and ejected. Finally, the rifle is equipped with a low-profile gas block, keeping the barrel’s exterior clean and unencumbered.
When I first started shooting the M400 Tread, I was pleasantly surprised. The rifle had a very user-friendly layout and the controls felt intuitive and easy to use. The grip was comfortable and fit my hand nicely, and the buttstock was adjustable just as advertised. I really liked the feel of the trigger and found that the break was very clean and consistent. After firing some rounds through the gun, I was impressed with the accuracy and recoil reduction. In addition, I had no issues with the reliability of the gun, and I was pleased to see that it operated flawlessly.
Overall, I am very pleased with the SIG Sauer M400 Tread. It is an easy-to-use, reliable, and accurate rifle that is perfect for just about anything the shooter can imagine. With a wide variety of features and customizable parts, the M400 Tread is a great choice for home defense, recreational shooting, hunting, and more. The M400 Tread has definitely lived up to the high standards set by SIG Sauer and I look forward to shooting it again soon.
Pros & Cons
Pros
-High quality materials and construction that is robust and reliable
-Versatile and customizable with a wide range of available upgrades
-Ambidextrous controls and comfortable ergonomics make it easy to use for left or right-handed shooters
-Features a top-notch trigger and an adjustable gas system
-Lightweight and compact size makes it easy to transport and handle
Cons
-Fairly expensive compared to other AR-15 rifles
-Lacks the same level of aftermarket accessories and upgrades as other AR-15 models
-The stock is not adjustable, so it is not as adjustable as other AR-15 models
-The M4 feed ramp may not feed all ammunition reliably
Who Should Buy
Anyone who is legally able to purchase firearms in their jurisdiction should buy the SIG SAUER M400 TREAD if they feel that this firearm meets their needs. The M400 TREAD may not be a good fit for those who are new to firearms or those who prefer other types of firearms (such as shotguns or handguns). Additionally, anyone who is inexperienced in using AR-platform firearms might not want to purchase the M400 TREAD.
Comparisons
| Product | Caliber | Mag Capacity | Barrel Length | Weight | MSRP |
|---|---|---|---|---|---|
| SIG SAUER M400 TREAD | 5.56 NATO | 30+1 rounds | 16" | 6.6 lbs | $799.99 |
| RUGER AR-556 | 5.56 NATO | 30+1 rounds | 16.10" | 6.5 lbs | $699.99 |
| COLT LE6960 | 5.56 NATO | 30+1 rounds | 16.1" | 7.3 lbs | $1,099.99 |
| SMITH & WESSON M&P15 | 5.56 NATO | 30+1 rounds | 16" | 6.45 lbs | $1,099.00 |
Features / Specs
• Caliber: 5.56 NATO/.223 Remington
• Action: Direct Impingement
• Barrel Length: 16”, Free-Floating
• Twist Rate: 1 in 8”
• Capacity: 5 to 30 rounds
• Upper Receiver: 7075-T6 Aluminum, Flat Top with M-Lok Handguard
• Lower Receiver: 7075-T6 Aluminum, Enhanced Trigger Guard
• Stock: 6-position Collapsible
• Grip: Magpul MOE
• Sights: Magpul MBUS
• Overall Length: 33” to 36.5”
• Weight: 6.1 lbs. (unloaded)
Popular Accessories
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- SIG SAUER M400 TREAD Soft Case
- Magpul MBUS® PRO Flip Sight Set
- Magpul M-LOK® AFG® Angle Foregrip
- Magpul MOE® Trigger Guard
- Magpul PMAG® 30-Round Magazine
- Magpul M-LOK® Hand Stop Kit
- Magpul M-LOK® Rail Cover
- Streamlight ProTac Rail Mount HL-X Laser/Light
- RailScales HandStop Kit
- Magpul MOE® Grip
Accuracy
The SIG SAUER M400 TREAD is unique among modern rifles in that it focuses on accuracy in its design. Featuring SIG's in-house Matchlite Duo SS trigger, the M400 TREAD is designed with precision in mind. This trigger is factory tuned to provide a crisp, clean break to make sure each shot is as accurate as the one before it. Coupled with the Accu-Tite Tension System, the TREAD is designed to provide a consistent and free float barrier for the lightweight aluminum forend to bolster accuracy even further. This combination helps to reduce accuracy-robbing vibrations that some rifles are prone to. Thanks to a 16" cold hammer-forged barrel, the M400 TREAD is capable of providing accuracy that rivals long-barreled precision rifles. Under many optimal conditions, the M400 TREAD will achieve 1 MOA from factory settings out to 500 yards. That's impressive accuracy to be sure and one of the many reasons why the M400 TREAD is becoming so popular.
