Knights Armament200190210
Knights Armament Sr-15 Ks-2 5.56 Nato 14.5'' Bbl Assembled Upper Rcvr Black$1,755.61
Availability: In Stock
Current Stock: Out of stock
The Knights Armament SR-15 KS-3 5.56 NATO upper receiver pairs a compact 11.5" barrel with the rugged engineering KA is known for, giving you a versatile short-rifle platform that handles like a dream in tight spaces. Built on a cold hammer-forged, chrome-lined barrel with a 1:7" twist rate, this assembled upper is ready to mount on a compatible lower receiver—making it an excellent choice whether you're building your first SR-15 or adding a second upper to an existing KS-1 or KS-2 rifle. The 11.5" barrel length hits that sweet spot between maneuverability and velocity, ideal for shooters who need compact handling without sacrificing 5.56 NATO ballistics.
If you already own an SR-15, you'll appreciate the KS-3's near-complete compatibility across Knights Armament's KS rifle family. Drop this upper onto your existing lower receiver and you've got a new gun without duplicating parts you already have. For those building from scratch, the KS-3 makes a solid foundation for a dedicated short-range rifle, home-defense carbine, or truck gun that doesn't demand space.
The cold hammer-forged barrel and chrome lining are hallmarks of KA's no-nonsense approach to durability. This isn't marketing—it's the kind of barrel material and treatment that stands up to hard use and corrosive environments. The 1:7" twist handles modern 5.56 ammo across the full velocity range, so you're not locked into a narrow ammunition diet.
| Barrel Length | 11.5" |
| Barrel Type | Cold hammer-forged, chrome-lined |
| Twist Rate | 1:7" |
| Caliber | 5.56 NATO |
| Configuration | Assembled upper receiver |
| Finish | Black |
Yes. The KS-3 upper features nearly 100% compatibility with other KS-series rifles, making it an ideal secondary upper receiver if you already own a KS-1 or KS-2. Always verify fit with your specific lower before final assembly.
This is an assembled upper receiver. You will need a compatible lower receiver to complete a functional rifle. The upper receiver itself is ready to install onto a lower.
The 11.5" barrel length offers excellent maneuverability and portability while maintaining effective 5.56 NATO performance. It's compact for transport and storage, and highly efficient for shooters who need a shorter handling profile without sacrificing reliability.
The 1:7" twist rate is compatible with standard and modern 5.56 NATO ammunition across the velocity spectrum, giving you broad ammunition compatibility without restriction to specialty loads.
SKU: 200190211 • Weight: 5.4oz