Description
The Knights Armament SR-15 Mod 2, SBR, 5.56, 11.5″, 30rd, Black *ALL NFA RULES APPLY* is a factory-built, short-barreled rifle from one of the most respected names in the tactical world. It’s a purpose-driven, compact 5.56mm platform designed for professional use and serious enthusiasts who demand reliability and performance in a maneuverable package, requiring an approved ATF Form 4 for transfer.
I’ve put a few thousand rounds through various KAC rifles over the years, and the SR-15 Mod 2 SBR is what happens when you take a proven system and refine it for close-quarters work. The 11.5-inch barrel gives you excellent ballistic performance from the 5.56 cartridge while keeping the overall length down for vehicle or structure work. Look, you’re not buying this for plinking soda cans at 100 yards—you’re investing in a tool built for a specific role.
Key Features
- Factory-built Knights Armament SR-15 SBR with 11.5″ chrome-lined barrel.
- Proprietary gas system and bolt carrier group designed for enhanced reliability and reduced recoil impulse.
- Includes Knights Armament URX 4 handguard for a solid mounting platform.
- Mil-spec compatible with many standard AR-15 parts and accessories.
- Comes with one 30-round magazine.
Specifications & Details
| Caliber | 5.56x45mm NATO |
|---|---|
| Barrel Length | 11.5 inches |
| Overall Length (Stock Collapsed) | Approx. 26.5 inches |
| Weight (Unloaded) | Approx. 6.5 lbs |
| Magazine Capacity | 30 Rounds |
| Finish | Black |
The heart of this system is the KAC proprietary E3 bolt and enhanced firing pin, which I’ve found to be incredibly durable under sustained fire. The URX 4 rail is rock-solid and provides a continuous top Picatinny section—perfect for mounting optics like an Aimpoint T2 or EOTech EXPS3. The rifle is drop-in ready from the factory; you won’t need to tweak the gas block or mess with the buffer system to get it running smoothly. At a price of $2198.27, you’re paying for that out-of-the-box perfection and the KAC name on the receiver.
Who This Rifle Is For
This SBR is for the shooter who understands the NFA process and wants a top-tier, no-compromise short-barreled rifle from the original equipment manufacturer. It’s for the end-user who values proven reliability over aftermarket customization, and who might pair it with a suppressor down the line. It’s also a collector’s piece for those who appreciate the pinnacle of AR-platform engineering. This unit is available at firearms-missouri.com for Missouri residents and nationwide, following all applicable NFA regulations.
Pros & Cons
Pros: Unmatched factory fit and finish. The KAC gas system is famously soft-shooting. The 11.5″ barrel is the ideal balance of length and velocity. Built as a complete, optimized system, not a parts kit. Holds its value exceptionally well.
Cons: The NFA wait is a significant hurdle. Proprietary parts like the bolt and gas block mean you can’t just grab any AR-15 spare. The price point is a serious investment. It’s not a lightweight build compared to some modern Gucci rifles.
Frequently Asked Questions
Q: What does *ALL NFA RULES APPLY* mean for this purchase?
A: This is a Short-Barreled Rifle (SBR) regulated under the National Firearms Act. Purchasing it requires submitting an ATF Form 4 with a $200 tax stamp, fingerprints, and a passport photo, and waiting for approval before the firearm can be transferred to you. We guide you through the process.
Q: Is the upper receiver compatible with a standard AR-15 lower?
A: Yes, the SR-15 upper is mechanically compatible with a mil-spec AR-15 lower receiver. However, for optimal performance and to maintain the rifle’s designed reliability, Knights Armament recommends using their complete system, including their proprietary bolt and gas system.
Q: Does this come with iron sights?
A: No, this model typically ships as shown with the rail handguard and no iron sights. This allows you to configure your optic and backup sight setup to your preference. Many users opt for a red dot and flip-up sights like Magpul MBUS Pro or KAC’s own micro sights.
If you’re ready to start the process on one of the most respected SBR platforms available, contact us to discuss the NFA transfer procedure.
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