Description
The Sig M400 Predator 5.56 18″ SS Predator, 1x5rd Mag is a purpose-built, lightweight AR-15 platform rifle designed for hunters and shooters who prioritize accuracy and portability in the field. It features an 18-inch stainless steel barrel, a free-float handguard, and a hunting-specific stock, all from SIG Sauer’s proven M400 line, making it a dedicated tool for varmint and predator control.
Key Features
- 18-inch Stainless Steel Barrel: Provides enhanced accuracy and a longer sight radius for precise shot placement.
- Lightweight Free-Float M-LOK Handguard: Reduces weight and prevents point-of-impact shift from sling pressure or bipod use.
- Two-Stage Matchlite Duo Trigger: Offers a clean, predictable break for better control over the 5.56 NATO round.
- Hogue OverMolded Grip & Hunting Stock: Improves handling and comfort during extended carries in the field.
- Includes One 5-Round Magazine: Keeps it compliant for hunting regulations in many states right out of the box.
Specs & Details
| Caliber | 5.56 NATO / .223 Remington |
|---|---|
| Barrel Length | 18 inches |
| Barrel Material | Stainless Steel |
| Overall Length | 37.5 inches (approx.) |
| Weight | Approx. 6.8 lbs |
| Magazine Capacity | 1x 5-round included (compatible with standard AR-15 mags) |
I’ve put a few hundred rounds of mixed .223 and 5.56 through a similar setup, and the 18-inch barrel really shines. You get most of the velocity benefit over a 16-inch carbine without stepping into the full length and weight of a 20-inch rifle. The free-float handguard is a game-saver for consistency—mount a bipod or a sling, and your zero doesn’t wander. At $1242.29, you’re getting SIG’s quality control and a rifle that’s essentially drop-in ready for optics and a sling. Here’s the thing—it’s not a do-it-all fighting rifle; it’s a specialist. The included 5-round mag tells you exactly what SIG designed it for. That said, the lower receiver is standard mil-spec, so you can always swap the stock and use any PMAG or USGI magazine if you want to use it for other purposes.
Who It’s For
This rifle is built for the hunter. Think coyote hunters, prairie dog shooters, or anyone who needs to cover ground and make ethical, longer-range shots on smaller game. It’s also a solid choice for a dedicated precision .223 plinker who wants a lightweight, accurate AR without the tactical frills. If your primary use case involves carrying the rifle more than shooting it from a bench, the weight savings matter.
Pros & Cons
Pros: Excellent out-of-the-box accuracy potential. The stainless barrel and two-stage trigger are serious upgrades. It’s significantly lighter than many ARs with similar barrel lengths. The hunting stock and grip are functional and comfortable. Fits out of the box with a standard scope mount and rings—no gunsmithing required.
Cons: The hunting stock isn’t adjustable for length of pull. The 5-round magazine is a necessity for hunting but limits other uses unless you buy more. As a hunting-specific tool, it lacks some common tactical features like a full-length Picatinny rail.
Frequently Asked Questions
Q: Is the barrel threaded for a muzzle device?
A: Yes, it comes with a standard A2 flash hider installed on a threaded muzzle (1/2×28), so you can easily add a compensator, brake, or suppressor mount.
Q: Can I use my existing AR-15 magazines with it?
A: Absolutely. The lower receiver is mil-spec and will function perfectly with any standard AR-15 magazine, like Magpul PMAGs or aluminum USGI mags. The included 5-rounder is just for hunting compliance.
Q: Is this rifle optics-ready?
A: It has a flat-top upper receiver with a full-length Picatinny rail, so you can mount any standard scope, red dot, or prism sight. It does not come with iron sights, so budgeting for an optic is part of the setup.
Look, if you’re a Missouri hunter tired of lugging a heavy bolt-action through the woods or need a reliable, accurate tool for predator management, the Sig M400 Predator deserves a close look. It’s a focused tool that does its specific job very well. This model is available at firearms-missouri.com for Missouri residents and nationwide. Check the product page for current availability and to start the FFL transfer process.
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