SIG SAUER SIGM400
Posted Jun 13, 2023
The SIG Sauer SIGM400 is a rifle with an incredible amount of features and performance capabilities, making it a top choice for military and law enforcement, as well as the civilian market. Chambered in 5.56 mm NATO, the SIGM400 features a mil-spec upper and lower receiver, and a government-profile barrel and trigger guard. This combination of reliable components allows for superior accuracy, reliability, and performance under even the most adverse conditions.
The upper and lower receivers are both made of 7075-T6 forged aluminum with a matte black finish and are type III hard anodized to resist corrosion and wear. As is typical with most military-grade rifles, the SIGM400 has a full-length Picatinny rail on the top of the upper, and forward and rear rail slots for attaching accessories. The rifle also has an integrated trigger guard to prevent any accidental discharges, and the front sight is mounted on a tool-less QD mount.
The barrel on the SIGM400 is a chrome-moly steel, hammer-forged with a 1:7 twist rate to stabilize the heavier bullets that are used in military and law enforcement applications. The barrel is equipped with an A2-style flash hider and an adjustable gas block. This allows the shooter to adjust the amount of gas that is passed through the barrel, which in turn allows for precise shooting with different ammunition types and barrel lengths.
The stock on the SIGM400 is adjustable, with a six-position collapsible buttstock that can be adjusted for length of pull and cheek height. The stock is also equipped with an enlarged rubber butt pad that offers increased comfort and grip on the shooter’s shoulder. This eliminates the need for bulky but uncomfortable cheek risers or stocks with elevated cheek plates.
The SIGM400 features a two-stage match grade trigger that is factory-set with a standard pull weight of 4.3 pounds, making it ideal for precision shooting and target work. The gold plated trigger design also reduces friction and wear, allowing for a smooth and consistent trigger pull.
The SIGM400 comes in a little bit heavier than some other models, weighing in at 8.2 pounds (without optics). The extra weight may be felt when held for long shooting sessions, but it does help reduce felt recoil. Additionally, the buttstock has an adjustable butt plate that can be easily adjusted to help counter the additional weight of the rifle.
Overall, the SIG Sauer SIGM400 is an excellent choice for military and law enforcement personnel who want a lightweight, reliable, and accurate rifle. The forged aluminum upper and lower receivers and government-profile barrel and trigger guard make it one of the most reliable rifles available, and the adjustable features on the stock allow for increased accuracy and performance. The two-stage match grade trigger ensures a smooth and consistent trigger pull, and the added weight helps to reduce felt recoil. This combination of features and performance capabilities makes the SIGM400 an ideal choice for those who need a rugged, reliable, and accurate rifle at an affordable price.
Pros & Cons
Pros:
-Lightweight and ergonomically designed for easy handling
-Adjustable gas system for different shooting scenarios
-High-quality components for superior performance
-Chambered in 5.56 NATO for reliable ballistics
-Integrated folding stock for increased portability
-Picatinny rails for easy mounting of optics and accessories
Cons:
-More expensive than some comparable rifles
-Less aftermarket support than some competitors
-Limited magazine capacity compared to other rifles
Who Should Buy
The SIG SAUER SIGM400 is a great option for anyone looking for a reliable, lightweight and dependable rifle. Shooters looking for an accurate, reliable and dependable firearm should consider this rifle.
Shooters looking for an AR-15 for home defense or other tactical applications may want to consider the SIG SAUER SIGM400. This is a great rifle for those looking for an accurate and dependable firearm.
On the other hand, those looking for an inexpensive rifle would be better served looking for something more affordable. The SIG SAUER SIGM400 is built with quality components and is well worth the price tag.
Comparisons
| SIG SAUER SIGM400 | SPRINGFIELD ARMORY HELLION BULLPUP | PALMETTO STATE ARMORY PA-10 | PALMETTO STATE ARMORY PSAK47 | |
|---|---|---|---|---|
| Action | Semi-Auto | Semi-Auto | Semi-Auto | Semi-Auto |
| Caliber | 5.56 NATO | .223 Wylde | .308 WIN | 7.62x39mm |
| Barrel | 16" | 16" | 18" | 16" |
| Weight | 6.50lbs | 7.60lbs | 8.85lbs | 7.70lbs |
| Mag Capacity | 30-rounds | 30-rounds | 20-rounds | 30-rounds |
Features / Specs
•Caliber: .223 Remington/5.56 NATO
•Stock: Six-Position Collapsible
•Barrel Length: 16"
•Twist: 1 in 7"
•Overall Length: 32.25"-35.5"
•Weight: 6.3 lbs
•Action: Direct Impingement
•Capacity: 30 Rounds
•Trigger Type: Standard
•Furniture: Polymer
Popular Accessories
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- Magazines
- Scope mounts
- Stocks
- Sling attachments
- Grips
- Flash suppressors
- Trigger kits
- Bi-pods
- Red dot sights
- Rail covers
Accuracy
The SIG SAUER SIGM400 is an impressive AR-15 rifle that offers excellent accuracy, even when firing at long distances. It is equipped with an adjustable trigger that allows for a crisp, clean break and a consistent single-stage pull for precision shot placement. The chrome-plated bore and 5.56 NATO chamber help ensure reliable function and tight groups at range. The rifling is designed for use with both .223 Remington and 5.56 NATO rounds, and provides users with a longer effective range. Tests have shown that the SIG M400 can shoot 1.5” groups from 100 yards with match-grade ammunition, and great accuracy can be had with other loads, furthering this rifle’s appeal to target shooters and precision rifle competitors alike.
