Knights Armament 5.56MM SR-15 KS-1 13.7" Upper Receiver Kit - 121435
Out of stock
Elevate your AR-15 build with the premium Knights Armament 5.56mm SR-15 KS-1 13.7″ Upper Receiver Kit, engineered for unmatched precision and reliability in demanding tactical scenarios. Designed by Knights Armament Company, a leader in military-grade firearms, this upper receiver kit delivers superior performance, whether you’re optimizing for suppressed fire or long-range accuracy. Crafted with cutting-edge materials and innovative features, it’s the ultimate upgrade for serious shooters seeking durability and consistency round after round.
Key Features
- Cold Hammer Forged Barrel: 13.7-inch heavy-profile barrel with 1:7 twist, chrome-lined for exceptional heat dissipation and longevity, featuring dimples for enhanced rigidity under heavy use.
- Optimized Gas System: Advanced low-back-pressure design ideal for suppressed configurations, reducing gas blowback and improving control during rapid fire.
- M-LOK Handguard: Lightweight, modular rail system for easy attachment of accessories, providing a secure grip and free-float design to maximize accuracy.
- Premium Construction: Forged 7075-T6 aluminum upper receiver with Type III hard-coat anodizing for corrosion resistance and a sleek black finish.
- M4 Feed Ramps and T-Marks: Ensures smooth feeding and compatibility with standard AR-15 components, with T-markings for professional assembly alignment.
Technical Specifications
- Caliber: 5.56mm NATO
- Barrel Length: 13.7 inches
- Receiver Material: 7075 Aluminum
- Finish: Anodized Black
- Forward Assist: Compatible
- Port Door/Dust Cover: Compatible
- Weight: 70.4 oz
- Dimensions: Length 23.7″, Width 1.3″, Height 2.3″
Why Choose the SR-15 KS-1 Upper Receiver Kit?
This kit addresses common challenges in tactical builds, such as overheating during extended sessions or inconsistent performance with suppressors. The dimpled heavy barrel maintains structural integrity, while the chrome lining promotes smoother operation and easier cleaning. Users praise its buttery-smooth cycling and ability to handle high round counts without failure, making it a reliable choice for professionals and enthusiasts alike. Integrate it seamlessly into your existing lower for a cohesive, high-performance rifle that stands up to rigorous training or field use.
Ready to enhance your setup with elite engineering? Secure the Knights Armament SR-15 KS-1 13.7″ Upper Receiver Kit today and experience the difference in quality and precision that only KAC can deliver.
Frequently Asked Questions
Q: What components are included in this upper receiver kit?
A: The kit includes the forged upper receiver, 13.7-inch cold hammer forged barrel, M-LOK handguard, bolt carrier group, charging handle, and all necessary gas system parts for a complete assembly.
Q: Is this upper compatible with standard AR-15 lowers?
A: Yes, it is fully compatible with mil-spec AR-15 lower receivers, ensuring easy integration into your existing build.
Q: Can this upper be used with suppressors?
A: Absolutely, the KS-1 design features a low-back-pressure gas system optimized for suppressed operation, minimizing gas to the shooter.
| Weight | 70.4 oz |
|---|---|
| Dimensions | 23.7 × 1.3 × 2.3 in |
| Finish | Anodized, Black |
| Forward Assist | Compatible |
| Port Door / Dust Cover | Compatible |
| Receiver Material | 7075 Aluminum |
| T-Marks | T-Marked |
| Feed Ramps | M4 |
| MPN | 121435 |
| UPC | 819064019411 |
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.
