Description
The Sig M400 300Blkout Enhnd Patrol ODG SA 223/556 16 30+1 ODG MOE Stk is a factory-built patrol rifle designed for versatility. It’s a 16-inch barreled AR-15 platform that handles both .300 AAC Blackout and 5.56 NATO/.223 Remington cartridges, offering a dual-caliber solution for defense, training, and tactical use right out of the box.
Key Features
- Dual-Caliber Upper: A single upper receiver with a 16-inch barrel chambered in .300 AAC Blackout, but with a 5.56 NATO/.223 Remington bolt carrier group included. This lets you swap calibers by changing the bolt and magazine.
- Patrol-Optimized Build: Comes ready with Magpul MOE furniture in OD Green, including the stock, pistol grip, and handguard for immediate ergonomic control.
- Enhanced Reliability: Built on Sig Sauer’s proven M400 platform with a mil-spec lower receiver, ensuring wide parts compatibility and dependable function.
- Scenario-Ready: The .300 Blackout caliber is purpose-built for suppressed use and short-barrel performance, making this a formidable option for home defense where over-penetration is a concern.
Specifications & Details
| Caliber | .300 AAC Blackout (Upper) / 5.56 NATO (Included BCG) |
| Barrel Length | 16 inches |
| Overall Length | Approx. 32-35 inches (stock extended/collapsed) |
| Weight (Unloaded) | Approx. 6.8 lbs |
| Magazine Capacity | 30+1 Rounds (with included .300 BLK mag) |
| Finish/Color | OD Green Anodized / Magpul OD Green Furniture |
Here’s the thing—when it comes to home defense, having a tool that’s adaptable is a force multiplier. This rifle gives you that. The included 5.56 NATO bolt carrier group means you can train affordably with .223 and then switch to the more potent .300 Blackout for serious social work. At a weight of roughly 6.8 pounds, it’s maneuverable in tight spaces without sacrificing the ballistic authority of a full-length barrel. The price point of $1067.08 positions it as a complete, no-gunsmithing-required package versus building a similar dual-role rifle from parts.
Who This Rifle Is For
This is for the prepared citizen who values flexibility. It’s for the Missouri landowner who needs a reliable patrol carbine for property defense, where the .300 Blackout’s performance from a 16-inch barrel is ideal for intermediate distances. It’s also for the shooter who understands the logistical advantage of a platform that can run two major calibers—one for practice, one for purpose. The rifle ships to Missouri and compliant US states, ready for your FFL transfer.
Pros & Cons
Pros: Exceptional caliber versatility from a single purchase. High-quality factory assembly from Sig Sauer ensures reliability. The Magpul MOE furniture provides immediate comfort and control. The mil-spec design means you can easily upgrade triggers, safety selectors, or other components with a huge aftermarket. It’s drop-in ready for an optic and light.
Cons: You must remember to swap the bolt and use caliber-specific magazines to safely change between .300 BLK and 5.56. The 16-inch barrel, while great for velocity, doesn’t maximize the subsonic, suppressed potential of .300 BLK like a shorter barrel would. It’s a specific solution for a shooter who wants both worlds.
Frequently Asked Questions
Q: Can I shoot 5.56/.223 ammunition through this rifle as it comes?
A: Not immediately. The upper receiver barrel is chambered exclusively for .300 AAC Blackout. However, Sig includes a separate 5.56 NATO bolt carrier group. To shoot 5.56/.223, you must install that included BCG and use 5.56 magazines. The rifle is designed for this quick swap.
Q: Is the handguard free-floated?
A: No, the included Magpul MOE handguard is a classic two-piece, drop-in style that attaches directly to the standard barrel nut. This provides a solid platform for mounting lights and vertical grips but isn’t free-floated for precision shooting.
Q: What magazines does it come with?
A: It ships with a 30-round magazine designed for .300 AAC Blackout ammunition. You will need to purchase separate 5.56/.223 magazines to use the rifle in that configuration. The lower receiver is standard AR-15 pattern and works with PMAGs and other mil-spec magazines.
This Sig M400 setup removes the guesswork from building a versatile patrol rifle. You get a trusted brand’s quality control, a practical two-caliber system, and proven Magpul ergonomics in one transaction. The value is in its ready-to-role capability. See the full details and availability at firearms-missouri.com for Missouri residents and nationwide.
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