Description
The Core15 Scout Keymod AR-15 300 Blackout 16″ Barrel 15″ Keymod Rail is a purpose-built, mid-length rifle designed for versatility and modularity. It’s a direct-impingement AR-15 platform chambered in the potent 300 AAC Blackout round, featuring a 16-inch barrel and a full-length 15-inch Keymod handguard for maximum accessory mounting real estate. This setup is engineered for shooters who need a reliable, adaptable firearm for defense, hunting, or range use, and it ships to Missouri and compliant US states.
Key Features
- 300 AAC Blackout Chambering: Optimized for suppressed fire and effective terminal ballistics from short barrels, making it a serious contender for home defense or hunting medium game.
- 15″ Keymod Free-Float Handguard: Provides a long, lightweight mounting platform for grips, lights, lasers, and bipods while improving accuracy and heat dissipation.
- 16″ Barrel with Mid-Length Gas: Delivers a smooth, reliable cycling impulse and manages the 300 BLK cartridge’s pressure effectively for enhanced durability.
- Mil-Spec Core Components: Built on a foundation of proven, mil-spec parts ensuring wide compatibility and reliability you can stake your safety on.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | 300 AAC Blackout |
| Barrel Length | 16 Inches |
| Handguard | 15-Inch Keymod |
| Action | Direct Impingement Semi-Auto |
| Magazine Capacity | 30 Rounds (Magazine Not Included) |
| Overall Length (Approx.) | 34-35 Inches |
Weighing in at roughly 6.5 to 7 pounds unloaded, this rifle balances maneuverability and stability. The 300 Blackout round itself is the star here—it delivers .30-caliber energy in an AR-15 platform, and it truly shines when paired with a suppressor. At $974.77, this Core15 Scout represents a focused investment in a modern tactical tool, not just another off-the-shelf rifle. It’s built to accept a vast ecosystem of AR-15 parts, meaning triggers, stocks, and grips from brands like Magpul or B5 Systems are drop-in ready. That said, the Keymod rail is your canvas; it’s compatible with a huge range of Keymod attachment pieces from companies like Bravo Company and Midwest Industries.
Who This Rifle Is For
This is for the pragmatic shooter. It’s for the Missouri landowner who needs a capable, short-to-mid-range hog rifle that’s quiet with a can. It’s for the home defender who understands the 300 BLK’s superior performance through barriers compared to 5.56 in urban environments. It’s also for the tinkerer who appreciates a solid foundation—the mil-spec compatibility means upgrades are straightforward, with no gunsmithing required for most common parts swaps. You get a rifle that fits out of the box for serious use but leaves the door open for personalization.
Pros & Cons
Pros: The 300 Blackout caliber is exceptionally versatile, effective suppressed, and powerful from this barrel length. The full-length handguard offers unmatched mounting flexibility and a solid grip forward of the magazine well. Built on reliable, mil-spec patterns, it ensures long-term parts availability and ease of maintenance. The mid-length gas system on a 16-inch barrel is a sweet spot for soft shooting and reliability.
Cons: Ammunition cost for 300 BLK is higher than 5.56 NATO, which impacts training frequency. The Keymod attachment system, while functional and lightweight, has been largely superseded by M-LOK in the commercial market, though attachments remain readily available. You’ll need to source your own magazines, as they are often not included. Here’s the thing—if you don’t plan to use a suppressor or hunt, a 5.56 rifle might be a more economical choice.
Frequently Asked Questions
Q: Can I use standard 5.56/.223 magazines with 300 Blackout?
A: Yes, in most cases. The 300 Blackout round is designed to function in standard AR-15 magazines originally made for 5.56/.223. We recommend using magazines dedicated to 300 BLK to prevent dangerous ammunition mix-ups. Brands like Magpul PMAGs work flawlessly.
Q: Is the barrel threaded for a muzzle device or suppressor?
A: Yes. The 16-inch barrel features a standard 5/8×24 threaded muzzle, which is the common thread pitch for .30 caliber devices. This allows you to attach a flash hider, compensator, or direct-thread a suppressor immediately.
Q: What’s the effective range of this 300 Blackout setup?
A: With supersonic ammunition, the 300 BLK from a 16-inch barrel is effective on medium game like deer out to around 150-200 yards. For defensive use or subsonic suppressed fire, practical engagement distances are typically inside 100 yards, where the round retains significant energy.
Ready to configure a versatile 300 Blackout platform for your needs? This Core15 Scout Keymod AR-15 is available at firearms-missouri.com for Missouri residents and nationwide. An FFL transfer is required for firearm purchases.


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