Knights Armament 5.56MM SR-15 KS-2 14.5" Upper Receiver Kit - 121436
Out of stock
Elevate your AR-15 build with the Knights Armament 5.56mm SR-15 KS-2 14.5″ Upper Receiver Kit, a pinnacle of tactical engineering designed for demanding shooters who refuse to compromise on reliability and precision. Crafted by Knight’s Armament Company (KAC), renowned for military-grade innovations, this upper delivers exceptional performance in high-stakes scenarios, ensuring smooth operation and enduring durability that outpaces standard AR-15 uppers.
Key Features
- Cold Hammer Forged Barrel: 14.5-inch length with 1:7 twist rate, chrome-lined for superior accuracy, heat resistance, and longevity—ideal for sustained fire without degradation.
- URX 4 M-LOK Handguard: Free-floating design with M-LOK slots for seamless accessory mounting, providing a lightweight, ergonomic platform that enhances handling and modularity.
- E3 Enhanced Bolt Carrier Group: Proprietary E3.2 bolt reduces friction and wear, promoting reliable extraction and feeding even under adverse conditions, minimizing malfunctions for peace of mind.
- Mid-Length Gas System: Optimized for reduced recoil and muzzle rise, delivering a softer shooting experience that improves follow-up shots and control.
- 7075-T6 Aluminum Receiver: T-marked and anodized black for corrosion resistance, with M4 feed ramps to ensure flawless ammunition flow and compatibility with standard components.
Specifications
- Caliber: 5.56mm NATO
- Barrel Material: Cold hammer forged, chrome-lined steel
- Receiver Material: 7075-T6 aluminum
- Finish: Type III hardcoat anodized black
- Weight: Approximately 4 lbs (64 oz)
- Length: 14.5 inches (barrel)
- Gas System: Mid-length
- Muzzle Device: Factory-installed A2 flash hider (not pinned)
- Forward Assist & Dust Cover: Compatible and included
Why Choose the SR-15 KS-2 Upper Receiver Kit?
In a market flooded with entry-level options, the KAC SR-15 KS-2 stands out by addressing common pain points like unreliable cycling, excessive recoil, and premature wear. Its advanced components— from the chrome-lined barrel that withstands thousands of rounds to the E3 bolt that enhances reliability—solve these issues, offering a professional-grade upper that performs flawlessly in training, competition, or defense. Built to mil-spec tolerances yet refined with KAC’s proprietary tech, it integrates seamlessly with your existing lower, transforming any AR-15 into a high-performance rifle without the hassle of mismatched parts.
Whether you’re a tactical enthusiast customizing for precision or a professional seeking battle-proven gear, this kit delivers tangible benefits: tighter groups, faster target reacquisition, and confidence in every round. Don’t settle for ordinary—invest in the superior engineering that defines Knight’s Armament excellence.
Frequently Asked Questions
Q: What components are included in the Knights Armament SR-15 KS-2 Upper Receiver Kit?
A: The kit includes the upper receiver, 14.5-inch cold hammer forged barrel, URX 4 M-LOK handguard, mid-length gas system, E3.2 bolt carrier group, charging handle, forward assist, dust cover, and factory muzzle device for a complete, ready-to-assemble upper.
Q: Is this upper receiver kit compatible with standard AR-15 lowers?
A: Yes, it adheres to mil-spec dimensions, ensuring drop-in compatibility with any standard AR-15 lower receiver, allowing for easy integration into your existing build.
Q: Does the kit require special tools for installation?
A: No special tools are needed beyond basic AR-15 assembly tools like a torque wrench for the barrel nut; it’s designed for straightforward installation by experienced builders.
Ready to upgrade your AR-15 with unmatched reliability? Secure your Knights Armament SR-15 KS-2 14.5″ Upper Receiver Kit today and experience the difference premium craftsmanship makes in the field.
| Weight | 64 oz |
|---|---|
| Dimensions | 14.5 × 1.35 × 2.35 in |
| Finish | Anodized, Black |
| Forward Assist | Compatible |
| Port Door / Dust Cover | Compatible |
| Receiver Material | 7075 Aluminum |
| T-Marks | T-Marked |
| Feed Ramps | M4 |
| MPN | 121436 |
| UPC | 819064019428 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Please select an FFL from the table below, if you do not see your desired FFL, click "Set Later" and you will be able to enter your FFL's information after checkout.
| Name | City | State | ZIP | Phone | |
|---|---|---|---|---|---|
|
Loading FFL contacts, please wait...
|



