Description
The Sig M400 Enhanced Patrol AR-15 5.56/223 16″ Barrel Flip-Up Sights MOE Flat Dark Earth 30rd Mag is a duty-ready, patrol-configured rifle built on a mil-spec foundation. It combines Sig Sauer’s reliability with Magpul MOE furniture for a versatile, out-of-the-box platform ready for home defense, training, or as a primary patrol rifle. This model ships to Missouri and compliant US states.
Key Features
- Patrol-Ready Configuration: Comes equipped with Sig’s own flip-up front and rear sights, so you can start training the moment you pick it up.
- Enhanced Magpul MOE Furniture: Features a Flat Dark Earth MOE pistol grip, MOE handguard, and a 6-position MOE stock for superior ergonomics and control.
- Sig’s M400 Forged Lower & Upper: Built on a true mil-spec AR-15 platform, ensuring wide parts compatibility and proven reliability.
- 16-Inch Barrel with 1:7 Twist: Optimized for stabilizing a wide range of 5.56mm and .223 Remington ammunition, from lighter training rounds to heavier defensive loads.
- Included 30-Round Magazine: Provides standard capacity for drills, courses, or defensive scenarios right from the start.
Specifications & Details
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 16 inches |
| Twist Rate | 1:7 inches |
| Overall Length | 32.25 – 35.5 inches (stock collapsed/extended) |
| Weight (unloaded) | Approx. 6.7 lbs |
| Magazine Capacity | 30 Rounds (included) |
Here’s the thing—when it comes to home defense or a long day on the range, you need a rifle that works without fuss. The M400 Enhanced Patrol is that rifle. Its mil-spec compatibility means you can easily upgrade triggers, grips, or optics mounts with a huge selection of aftermarket parts from brands like Geissele, Radian, or BCM. The included flip-up sights are robust and provide a solid co-witness foundation for when you add a red dot or holographic sight. At a weight of just under 7 pounds unloaded, it balances well for maneuverability in tight spaces without feeling overly light. The price point of $938.77 positions it as a serious contender against other entry-level duty rifles, offering Sig’s pedigree without a custom shop price tag.
Who This Rifle Is For
This rifle is built for the shooter who values a ready-to-roll setup. It’s for the homeowner seeking a dependable, semi-automatic platform for property defense. It’s for the patrol officer or armed professional looking for a reliable, personally-owned patrol rifle that fits out of the box. It’s also an ideal first AR-15 for the Missouri sportsman who wants a quality foundation from a major manufacturer, avoiding the need to piece together a basic rifle from separate components.
Pros & Cons
Pros: The rifle arrives with essential iron sights and ergonomic furniture installed, saving immediate upgrade costs. Sig Sauer’s quality control on the barrel and bolt carrier group is excellent. The Flat Dark Earth finish provides a tactical aesthetic that also reduces visual signature. The mil-spec lower receiver guarantees compatibility with a vast universe of AR-15 accessories and parts.
Cons: As a complete factory rifle, it may include components a seasoned builder would choose differently, like the standard trigger. The MOE handguard, while comfortable, lacks integrated M-LOK or Keymod attachment points for lights and vertical grips without adding adapters. Some may prefer a different stock, but the MOE is a proven and easily swapped component. The rifle’s total length with the stock extended is just over 35 inches, which is manageable but worth considering for very compact storage.
Frequently Asked Questions
Q: Is the barrel threaded for a muzzle device?
A: Yes. The 16-inch barrel features a standard 1/2×28 thread pattern, protected by an A2-style flash hider. This allows for direct attachment of suppressors, muzzle brakes, or compensators. An FFL transfer is required for firearm purchases.
Q: Can I use .223 Wylde ammunition in this rifle?
A: Absolutely. The 5.56 NATO chambering safely fires both 5.56mm and .223 Remington rounds. The 1:7 twist rate is particularly well-suited for heavier .223 and 5.56 bullets commonly used in defensive and match-grade loads, ensuring stable flight.
Q: Does the handguard have a full-length top rail?
A: It does. The upper receiver and handguard form a continuous Picatinny rail from the rear sight base to the front sight post. This gives you ample space for optics, backup sights, or other rail-mounted accessories without any gaps in your sighting system.
Ready to add this patrol-configured Sig Sauer to your collection? Check availability and pricing at firearms-missouri.com for Missouri residents and nationwide.
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