Description
The Maxim Defense MD-15 .300 BLK, 8.5″ Barrel, Black, SCW Stock is a compact, integrally suppressed-ready AR-pattern pistol built for close-quarters use. It’s a premium, short-barreled rifle (SBR) configuration designed from the ground up for the .300 AAC Blackout cartridge, offering a complete package that prioritizes minimal overall length and suppressor compatibility without sacrificing reliability. At $1593.30, it sits in a competitive space for a factory-built, purpose-driven firearm. This isn’t your average budget AR, but for the shooter who needs a compact, capable .300 BLK platform that’s drop-in ready, it presents a specific value proposition by bundling high-end features into one SKU.
Key Features
- Optimized for .300 BLK: The 8.5-inch barrel length is the sweet spot for maximizing the subsonic and supersonic performance of the .300 AAC Blackout round.
- SCW Collapsing Stock System: Maxim’s proprietary stock collapses to an ultra-compact length, drastically reducing the firearm’s overall footprint for storage and transport.
- Suppressor-Ready Design: The barrel is threaded 5/8×24 and designed for direct attachment of compatible muzzle devices and suppressors.
- Complete Upper & Lower: Comes as a fully assembled firearm, not a parts kit. It’s built with quality components that work together from the start.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | .300 AAC Blackout |
| Barrel Length | 8.5 inches |
| Overall Length (Extended) | Approx. 28-30 inches |
| Overall Length (Collapsed) | Approx. 22-24 inches |
| Stock | Maxim Defense SCW Collapsing Stock |
| Thread Pattern | 5/8″x24 TPI |
The heart of this system is the 8.5-inch cold hammer-forged barrel, a length that lets the .300 BLK powder burn efficiently. Weighing in at roughly 6.5 pounds unloaded, it’s manageable for its size. The SCW stock isn’t just for looks—it’s a core part of the compact design, using a proprietary buffer system to function reliably in the shortened configuration. This package is mil-spec compatible where it counts, meaning many standard AR-15 triggers, grips, and accessories will fit, giving you room for personalization. FFL transfer required for firearm purchases.
Who This Firearm Is For
This MD-15 is for the shooter who has a specific role in mind: a truck gun, a home defense tool, or a compact hunting rig for thick brush. It’s ideal for someone who understands the .300 BLK’s ballistic advantages at short range and plans to eventually pair it with a suppressor. You’re paying for an integrated, no-hassle solution from a reputable brand. If you were considering piecing together a similar high-quality pistol from parts, the total would likely meet or exceed this price—here, the fit, finish, and guaranteed compatibility are already handled. That said, if your primary goal is the absolute cheapest plinking rifle, a standard 5.56 AR is a more budget-friendly path.
Practical Pros & Cons
Pros: The main advantage is the complete, coherent package. You get a firearm engineered as a single unit, not a collection of parts. The SCW stock provides a legitimately compact form factor that standard buffers and braces can’t match. The 8.5″ barrel is the ideal length for the .300 BLK cartridge, making it a highly efficient platform. Build quality from Maxim Defense is consistently high, which justifies a portion of the price premium.
Cons: The price tag is the most obvious hurdle. At over $1500, it’s a significant investment. You’re also committing to the .300 BLK ecosystem, where ammunition costs more than 5.56x45mm NATO. The proprietary SCW stock system, while excellent, locks you into Maxim’s components for the buffer and stock itself, limiting aftermarket swaps compared to a standard receiver extension.
Frequently Asked Questions
Q: Is this considered a pistol or a short-barreled rifle (SBR)?
A: As configured from the factory with the SCW stock, this is classified as a Short-Barreled Rifle (SBR) and requires the appropriate ATF Form 1 or 4 approval and tax stamp before taking possession. Your FFL will guide you through this process.
Q: Can I use standard AR-15 magazines?
A: Yes. The .300 AAC Blackout round is designed to function flawlessly in standard 5.56/.223 AR-15 magazines. We recommend using magazines dedicated to .300 BLK to avoid accidental mix-ups with 5.56 rounds, which are not safe to fire in this barrel.
Q: What kind of optic should I put on this?
A: Given its intended short-range role, a compact red dot sight is an ideal pairing. Popular models like the Aimpoint T-2 or Holosun HE503 series offer great durability and battery life. A low-power variable optic (LPVO) in a 1-6x or 1-8x range is also a versatile choice if you plan to stretch its legs with supersonic ammunition.
For the shooter who values a turn-key, compact .300 BLK solution where engineering and size take priority over bottom-shelf pricing, the Maxim Defense MD-15 presents a compelling case. It’s available at firearms-missouri.com for Missouri residents and nationwide. See the full product page for more details and current availability.
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