Knights Armament Lower
Knights Armament SR-15 Complete Lower

Knights Armament SR-15 Complete Lower


Product Specifications

  • Manufacturer: Knights Armament Company (KAC)
  • Fits: SR-15, AR-15
  • Ambi: Yes
  • Caliber: 5.56
  • Color: Black
  • Includes: SOPMOD Stock, 6-position Buffer Tube
  • Integrated Trigger Guard: Yes
  • Material: Aluminum
  • Receiver Type: Forged

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The Ultimate Guide to Knights Armament Lower Receivers

Knights Armament Company (KAC) is synonymous with precision, durability, and innovation in the world of firearms. Within the enthusiast community, the choice of a lower receiver is critical, as it forms the backbone of any firearm build. The Knights Armament lower receiver is particularly revered for its quality and compatibility with various upper receivers and components. This comprehensive guide dives deep into the world of Knights Armament lower receivers, exploring their features, compatibility, and why they might be the perfect foundation for your next rifle build.

Understanding Lower Receivers

At its core, a lower receiver is the part of the firearm that houses the fire control group (trigger, hammer, selector), magazine well, and provides mounting points for the stock and grip. The Knights Armament lower receiver is not just any lower receiver; it’s a testament to KAC’s commitment to excellence. Crafted with precision and designed for reliability, these lowers are sought after by professionals and also enthusiasts alike.

Knights Armament Lower Overview

Knights Armament Lower Receiver: The Foundation of Precision

The Knights Armament lower receivers are renowned for their superior material and build quality. Manufactured from high-grade aluminum, these lower receivers offer an unmatched balance of durability and weight savings. Each receiver features meticulously machined surfaces and dimensions that ensure a perfect fit with other components, resulting in a smoother operation and also enhanced reliability.

For more details on features and specifications, visit Knights Armament’s official page.

Knights Armament SR-15 Lower: The Ultimate Choice

Among the lineup, the Knights Armament SR-15 lower stands out.

specifically designed to pair with the SR-15 platform, providing a seamless fit and operation. This lower receiver improves ergonomics, shooting accuracy, and overall rifle performance. What sets the SR-15 lower apart is its ambidextrous controls and enhanced trigger guard, making it an ideal choice for both left and right-handed shooters.

To explore the SR-15 lower, visit Knight’s Armament SR-15 Lower Receiver Assembly Kit page.

Receiver Assembly: Putting It All Together

Assembly of a Knights Armament lower receiver is a straightforward process, provided you have the right tools and also guidance. You’ll need a set of punches, a hammer, and a receiver block to properly secure the lower during the assembly. Following a step-by-step guide, you can successfully assemble your lower receiver, ensuring it’s ready to pair with an upper receiver and other components for a complete build.

For tools and parts, consider checking out options at Primary Arms.

Compatibility and Customization

A common question is, “What upper receivers fit a Knights Armament lower receiver?” The good news is that KAC lower receivers offer broad compatibility with various upper receivers. This includes the company’s own SR-15 uppers, which are designed to pair perfectly with their lower counterparts for optimal performance.

To view compatible upper receivers, visit Lucky Gunner.

Choosing the Right Lower Receiver

Choosing a Knights Armament lower receiver means selecting a foundation that ensures reliability, performance, and also precision. Whether you’re a professional operator or a firearm enthusiast, the quality and craftsmanship of KAC lowers make them a top choice.

Maintenance and Care

Maintaining your Knights Armament lower receiver is crucial for ensuring its longevity and also reliability. Regular cleaning, proper storage, and the use of quality ammunition like the M855A1 can help maintain its performance.


Q: Can you use a Knights Armament lower for SOPMOD?
A: Yes, Knights Armament lowers are fully compatible with SOPMOD components, allowing for extensive customization.

Q: What upper receivers fit a Knights Armament lower receiver?
A: Knights Armament lower receivers designed to fit a wide range of upper receivers, including their own SR-15 uppers, offering flexibility in rifle configuration.


Choosing a Knights Armament lower receiver is the first step towards building a high-quality, reliable, and custom firearm. With unmatched precision, compatibility, and a reputation for excellence, KAC lowers are the top choice for those who demand the best. Whether you’re assembling a rifle for professional use or personal enjoyment, a Knights Armament lower is the foundation you can trust.

For further exploration of components and accessories for your build, consider visiting Lucky Gunner for AR triggers and other high-quality parts.


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