SIG SAUER M400-DH3
Posted May 19, 2023
The SIG SAUER M400-DH3 is a carbine length AR-15 style rifle that has been designed to be light and maneuverable while still providing the reliability of a standard AR-15. As this market segment has become increasingly popular in recent years, SIG SAUER has taken advantage of this opportunity to create a rifle that is accurate, versatile, and rugged. In this review, we will take an in-depth look at the SIG SAUER M400-DH3 to determine whether it is the right rifle for you.
First, let's look at the build of the M400-DH3. The rifle is constructed of high-grade aluminum and steel components that are held together by a mil-spec receiver set and receiver extension. The full-length aluminum handguard has four integrated quick-release attachment points, and the overall balance of the rifle is well-executed. A Magpul MOE M-Lok handguard provides a slim and comfortable grip when using the rifle, which helps improve accuracy and stability when firing.
When it comes to the upper and lower receivers, the M400-DH3 features a forged 7075-T6 aluminum upper receiver with a forward assist and dust cover, as well as a mil-spec 7075-T6 aluminum lower receiver with an integrated trigger guard. The two-piece aluminum magazine well provides a secure fit for magazines and helps to ensure reliable feeding.
The M400-DH3 also features a 16-inch chrome-lined, 1:7 twist barrel with an A2 flash suppressor. This barrel provides the optimal balance between accuracy and maneuverability for this platform, making it a great choice for both target shooting and close-quarter tactical use. The muzzle threading also allows for easy attachment of suppressors or muzzle devices, if desired.
The final piece of the puzzle is the trigger. On the M400-DH3, you will find a SIG SAUER Stainless Trigger Group with an enhanced trigger pull of approximately 4.5 lbs. This ensures that the rifle responds accurately and crisply to each pull of the trigger. Based on our experience, we can vouch for the outstanding performance of this trigger, as it consistently produces dependable and reliable results while also allowing for fine control over the rate of fire.
When it comes to overall accuracy, the M400-DH3 delivers excellent results across the board. At 100 yards, we were able to consistently achieve groupings of 1.5-2.0 MOA using our preferred ammunition. This is in line with what you would expect from an AR-15 of this caliber. In addition, the barrel and gas system are optimized for use with the 300 Blackout cartridge, which is becoming increasingly popular among tactical and competitive shooters alike.
In terms of ergonomics, the M400-DH3 has been designed with the end user in mind. It is light and maneuverable, yet still feels solid and well balanced in the hands. The controls are intuitive and easily accessible, and the slim profile of the stock helps to improve comfort and accuracy while shooting. With the integrated Picatinny rail on the upper, the user is also able to attach any number of accessories and optics to the rifle for increased versatile and customization.
Overall, we have found the SIG SAUER M400-DH3 to be an outstanding rifle that delivers outstanding performance in both tactical and target shooting applications. Not only is it accurate and reliable, but it also provides excellent ergonomics and is built to last. With a retail price of around $1,500, it is also an excellent value for the money and a great option for anyone in the market for a high-quality AR-15.
Pros & Cons
Pros:
- The rifle is lightweight and balanced, making it comfortable to carry and shoot.
- It features a mil-spec trigger, providing a consistently smooth pull and a solid reset.
- The adjustable gas system allows the rifle to be easily customized to different ammunition types.
- The Magpul MOE furniture provides comfortable ergonomics and good storage options.
- It is also compatible with a number of popular AR accessories and optics.
Cons:
- The price point is on the higher end.
- It does not come with a match-grade barrel, and the barrel twist rate isn’t ideal for shooting heavier rounds.
- The Magpul MOE stock is non-adjustable, limiting personal preference and fit.
Who Should Buy
The SIG SAUER M400-DH3 is a great choice for anyone looking for a reliable, high-performance semi-automatic rifle. It is well suited for both new and experienced shooters alike. That being said, anyone who is unfamiliar with rifle handling and shooting should not purchase this weapon without first receiving proper training from a qualified instructor. Anyone looking for a simple target-practice or recreational firearm should also look elsewhere, as this weapon is not designed for those purposes.
Comparisons
| Sig Sauer M400-DH3 | Product 1 | Product 2 | Product 3 |
|---|---|---|---|
| Barrel Length | 16" | 16" | 16" |
| Weight | 7 lbs | 7.8 lbs | 7.3 lbs |
| Cartridge Capacity | 30 Rounds | 30 Rounds | 20 Rounds |
| Caliber | 5.56 NATO | 5.56 NATO | 5.56 NATO |
| Action Type | Semi-Auto | Semi-Auto | Semi-Auto |
| Price Range | $$ | $$$ | $$ |
Features / Specs
•Caliber: 5.56 NATO/.223 Rem
•Barrel Length: 16"
•Threaded Barrel: 1/2 x 28
•Twist Rate: 1:7 RH
•Overall Length: 35.5 - 38.25 Inches
•Capacity: 30 Rounds
•Weight: 6.4 lbs
•Finish: Mossy Oak Shadow Grass Blades
•Safety: Ambidextrous Manual Thumb
Popular Accessories
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The most popular accessories for the SIG SAUER M400-DH3 include optics, magazines, and stocks (carbine or pistol) for the platform. Other popular accessories include a sling, cleaning kit, rail covers, an angled foregrip, trigger guard, and extended charging handle. It is also possible to customize the M400-DH3 with lights, laser aiming devices, and other sighting options for a truly personalized shooting experience.
Accuracy
The SIG SAUER M400-DH3 is a highly reliable and accurate rifle. It is designed to provide consistent accuracy with a tight shot groupings. The hammer forged chrome-lined barrel provides enhanced corrosion resistance as well as superior accuracy. The M400-DH3 also features a free-floating forend for a solid and repeatable zero. With a quality match grade trigger and well constructed stock, the rifle can be expected to fire accurate shots out to 300 yards.
