Knights Armament Sr-15 Ks-3 5.56 Nato 11.5'' Bbl Assembled Upper Rcvr BlackKnights Armament$1,755.61
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Knights Armament
The Knights Armament SR-15 KS-2 is a complete 5.56 NATO assembled upper receiver built for shooters who demand precision and reliability in a compact, versatile platform. Built around a 14.5" cold hammer forged barrel with chrome lining and a 1:7" twist rate, this upper delivers consistent accuracy across the full spectrum of 5.56 loads while maintaining the ballistic performance most AR builders trust for general-purpose carbine duty. The KS-2 strikes a practical balance between portability and capability—ideal for home defense builds, patrol rifles, or shooters who want a proven upper without the guesswork of component selection.
What sets this upper apart is the 12.75" handguard, which offers genuine flexibility for mounting accessories without compromising ergonomics. You've got plenty of real estate on the top rail to stack an optic, light, and laser or night vision device in a logical arrangement, and the design doesn't force you into awkward compromises. The cold hammer forged barrel is a time-tested choice in professional and civilian builds alike—it handles rapid fire, long strings, and environmental stress better than cheaper alternatives, which means you're building on a foundation that'll outlast trends.
This is a complete upper receiver, so you're buying a finished, tested assembly ready to drop onto a compatible lower receiver. Knights Armament's quality control and attention to detail on the SR-15 platform are well-earned in the industry. Whether you're building a duty rifle, a lightweight trainer, or a dependable rifle for hunting or range work, the SR-15 KS-2 gives you a proven baseline that won't nickel-and-dime you with fitment issues or durability surprises down the line.
| Barrel Length | 14.5" |
| Barrel Type | Cold hammer forged, chrome lined |
| Twist Rate | 1:7" |
| Cartridge | 5.56 NATO |
| Handguard Length | 12.75" |
| Finish | Black |
This is a standard AR-15 format upper receiver. It will fit any AR-15 compatible lower receiver chambered in 5.56 NATO or .223 Remington.
Yes. This is a complete assembled upper receiver. You'll need to attach it to a compatible lower receiver and add your optic and any other accessories you want to run.
A 1:7" twist stabilizes a wide range of 5.56 NATO bullet weights, from lighter 55-grain to heavier 77-grain rounds, making it versatile for hunting, training, and duty applications.
Yes. The 12.75" handguard includes top rail space designed to accommodate night vision devices, lasers, and other accessories alongside your primary optic.
Knights Armament
The Knights Armament SR-15 KS-2 is a complete 5.56 NATO assembled upper receiver built for shooters who demand precision and reliability in a compact, versatile platform. Built around a 14.5" cold hammer forged barrel with chrome lining and a 1:7" twist rate, this upper delivers consistent accuracy across the full spectrum of 5.56 loads while maintaining the ballistic performance most AR builders trust for general-purpose carbine duty. The KS-2 strikes a practical balance between portability and capability—ideal for home defense builds, patrol rifles, or shooters who want a proven upper without the guesswork of component selection.
What sets this upper apart is the 12.75" handguard, which offers genuine flexibility for mounting accessories without compromising ergonomics. You've got plenty of real estate on the top rail to stack an optic, light, and laser or night vision device in a logical arrangement, and the design doesn't force you into awkward compromises. The cold hammer forged barrel is a time-tested choice in professional and civilian builds alike—it handles rapid fire, long strings, and environmental stress better than cheaper alternatives, which means you're building on a foundation that'll outlast trends.
This is a complete upper receiver, so you're buying a finished, tested assembly ready to drop onto a compatible lower receiver. Knights Armament's quality control and attention to detail on the SR-15 platform are well-earned in the industry. Whether you're building a duty rifle, a lightweight trainer, or a dependable rifle for hunting or range work, the SR-15 KS-2 gives you a proven baseline that won't nickel-and-dime you with fitment issues or durability surprises down the line.
| Barrel Length | 14.5" |
| Barrel Type | Cold hammer forged, chrome lined |
| Twist Rate | 1:7" |
| Cartridge | 5.56 NATO |
| Handguard Length | 12.75" |
| Finish | Black |
This is a standard AR-15 format upper receiver. It will fit any AR-15 compatible lower receiver chambered in 5.56 NATO or .223 Remington.
Yes. This is a complete assembled upper receiver. You'll need to attach it to a compatible lower receiver and add your optic and any other accessories you want to run.
A 1:7" twist stabilizes a wide range of 5.56 NATO bullet weights, from lighter 55-grain to heavier 77-grain rounds, making it versatile for hunting, training, and duty applications.
Yes. The 12.75" handguard includes top rail space designed to accommodate night vision devices, lasers, and other accessories alongside your primary optic.