Description
The Knight’s Armament System SR-15 SBR Mod 2 5.56mm, 11.5″ Barrel, Short Barrel Rifle- NFA is a premium, factory-built short-barreled rifle (SBR) designed for close-quarters use and vehicle operations. It’s a complete, high-reliability platform from a legendary manufacturer, requiring an ATF Form 4 tax stamp for legal transfer. This isn’t a budget build—it’s a purpose-driven tool where the $2440.23 price tag buys proven performance and durability in a compact, hard-use package.
Key Features
- Factory-Built SBR: Comes as a complete, registered short-barreled rifle from KAC, ensuring optimal gas system tuning and reliability from the source.
- 11.5″ Barrel with Proprietary Gas System: The shorter barrel enhances maneuverability. Knight’s patented gas system reduces felt recoil and parts wear, a key value for long-term ownership.
- URX 4 Handguard: Provides a slim, rigid mounting platform for lights, lasers, and grips without adding excessive bulk or weight.
- Enhanced Reliability: Includes KAC’s proprietary extractor, sandcutter bolt carrier, and other internal upgrades aimed at surpassing standard mil-spec performance.
- Mil-Spec Compatibility: The lower receiver is compatible with many standard AR-15 parts and accessories, allowing for some customization without specialized tools.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | 5.56x45mm NATO |
| Barrel Length | 11.5 inches |
| Overall Length (Stock Collapsed) | Approx. 26.5 inches | Weight (Unloaded) | Approx. 6.2 lbs |
| Magazine Capacity | Comes with one 30-round PMAG (or similar) |
| Muzzle Device | Knight’s Armament QDC Flash Suppressor |
Look, the SR-15 Mod 2 platform is renowned for its over-engineered reliability. The 11.5-inch barrel is a sweet spot for balancing ballistic performance with extreme compactness—you lose some velocity compared to a 14.5″ or 16″ rifle, but for its intended role inside 200 yards, it’s more than capable. The real question is whether you need this level of refinement or if a more affordable piston-driven or direct-impingement SBR would suffice. The rifle is drop-in ready, but remember, an FFL transfer required for firearm purchases, especially NFA items, involves extra paperwork and a wait.
Who This Rifle Is For
This SBR is for the shooter who prioritizes absolute reliability in a compact defensive or duty rifle and is willing to pay for it. It’s suited for law enforcement, serious home defenders who have navigated the NFA process, and enthusiasts who value the KAC ecosystem. It’s less ideal for first-time NFA buyers or those on a tight budget where a high-quality 16″ AR or a more budget-friendly SBR might offer better value for their specific needs.
Pros & Cons
Pros: Unmatched factory-built quality and reliability from KAC. The optimized gas system genuinely softens recoil and extends component life. The 11.5″ configuration is highly maneuverable. Holds its value exceptionally well in the firearms market. Available at firearms-missouri.com for Missouri residents and nationwide.
Cons: The $2440.23 price is a significant investment, placing it well above many other SBR options. The NFA process adds $200 and months of waiting. Proprietary parts (like the bolt) can be more expensive and harder to find than standard AR-15 components. You’re paying a premium for the name and incremental gains.
Frequently Asked Questions
Q: Is the muzzle device pinned and welded?
A: No. As a factory SBR with a barrel under 16 inches, the Knight’s QDC flash suppressor is not permanently attached. This allows you to change muzzle devices or attach a suppressor using the KAC Quick Detach system, though you’ll need to ensure any new device complies with NFA overall length rules if replacing the stock.
Q: Can I use standard AR-15 magazines and ammunition?
A: Yes. The SR-15 lower receiver is designed to work flawlessly with standard mil-spec AR-15 magazines like Magpul PMAGs and USGI aluminum mags. It chambers and fires standard 5.56x45mm NATO and .223 Remington ammunition without issue.
Q: What’s included with the rifle?
A: Typically, the rifle ships with one magazine, the QDC flash suppressor, operator’s manual, and case. It is a complete firearm, ready for your chosen optic, sighting system, and light—no gunsmithing required to begin using it, pending your approved Form 4.
If a top-tier, no-compromise SBR from one of the most respected names in the business aligns with your requirements and budget, this Knight’s Armament System represents a definitive choice. Consider your total cost, including the tax stamp, and proceed with your local FFL for the transfer process.
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