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Knights Armament KAC SR-15 Original Lower Receiver Assembly - Complete Refurbished Take-off

Was: $1,605.00
Now: $1,499.00
SKU:
KAC0257812
Availability:
when in stock, ships from our workshop in 6 to 10 days after your dealer is approved
Limited Availablility:
expect some delays in dissaembly from rifle
Knights Armament KAC SR-15 Original Lower Receiver Assembly

 Knights Armament SR15 Lower Receiver - Original Non-Ambi Used / Refurbished

Battle-Proven Foundation for Precision Rifle Builds

The Knights Armament SR15 lower receiver is a critical component of the renowned SR15 rifle system. This non-ambidextrous, non-Integrated Weapon System (IWS) variant comes complete with a buffer tube, two-stage KAC trigger, and all original internal components.

This particular unit is a carefully refurbished, grade A- example from Charlie's Custom Clones. Our conservative grading system ensures that you receive a product that exceeds expectations. While there is some minor wear on the trigger hammer, the rest of the receiver is in like-new condition, showcasing the durability and quality of KAC manufacturing.  This lower was "harvested" from a gently used KAC SR15, and parts removed, cleaned, oiled and reassembled.  You will be very impressed with the condition.  The only real noticeable wear is on the trigger hammer, where it strikes the firing pin.  As a take-off from a rifle, it can be rebuilt as a rifle or an SBR with a Form 1 filing.  It cannot be legally built into an AR pistol.

Many rifle enthusiasts struggle to find lower receivers that offer the perfect balance of durability, precision, and proven performance. Off-the-shelf options often fall short in high-stress situations, potentially compromising accuracy and reliability when it matters most.

Key Features and Benefits:

  • Forged 7075-T6 aluminum construction for superior strength
  • Precision machined for seamless upper receiver fit
  • KAC two-stage trigger for crisp, consistent breaks
  • Six-position buffer tube for adaptability
  • Take-off from a full rifle, ensuring system compatibility
  • Suitable for rifle or SBR builds (not for pistol configurations)
  • All original parts included for authentic KAC performance
  • Take off from a full rifle

The KAC SR15 lower receiver addresses these concerns head-on. Its mil-spec construction and precise manufacturing ensure exceptional durability and accuracy. The included KAC two-stage trigger provides a crisp, predictable break, essential for maintaining shot placement under stress.

For operators and enthusiasts seeking a battle-proven foundation for their precision rifle build, this KAC SR15 lower offers uncompromising quality and performance. Its history as a take-off from a full rifle guarantees system compatibility, while the inclusion of all original parts allows for authentic KAC performance or customization options.

Diving deeper, the SR15 lower receiver features KAC's proprietary bolt catch design, enhancing reliability and ease of operation. The buffer tube, with its six-position capability, allows for stock adjustment to suit various shooting positions and user preferences. The trigger guard is integral to the lower, reducing potential weak points. KAC's attention to detail is evident in the precision-machined magazine well, facilitating smooth and reliable magazine changes.

Specifications:

  • Material: 7075-T6 aluminum
  • Finish: Type III hardcoat anodized
  • Trigger: KAC two-stage (4.5 lbs)
  • Buffer Tube: 6-position, mil-spec diameter
  • Fire Control Markings: Safe-Semi-Auto
  • Weight: 28 oz (approx., stripped)
  • Compatibility: AR-15 pattern components

Buying and shipping through Charlie’s is easy, but there is some information you need to know. This item must ship to FFL holder. No civilian exceptions.

       1)  Check your state laws to make sure the federally regulated item you want to purchase is legal in your state.

       2)  Find your FFL… Have your dealer send us a copy of their FFL to Charlie’s (Make them earn their fee!!!)

       3)  Be patient! You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.

That’s it! We try to make this process as simple as possible for our customers. Please click the “Buying a Firearm” tab at the top of this page for more information. 

THIS ITEM CANNOT BE SHIPPED TO CALIFORNIA

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THIS IS A SERIALIZED FIREARM.  It must ship to a Federal Firearms License holder.  No civilian exceptions.

Buying and shipping through Charlie’s is easy, but there is some information you need to know. Only a federally licensed firearms dealer may receive a firearm or federally regulated serialized item (like a receiver or suppressor). We cannot ship these items directly to you. Please follow these steps to process your transaction:

1)     Check your state laws to make sure the federally regulated item you want to purchase is legal in your state. Your FFL dealer should be able to give you all of the necessary information regarding your state specific laws. But, if we ship to your FFL, and there is a legal issue, we cannot accept a return. So please make sure that you know and follow your local and state laws.

 

2)     A quick google search will show you what Federal Firearms Licensed (FFL) dealers are in your area. When you are ready to purchase, contact the FFL dealer you would like to use and get their shipping address. During the check-out, put YOUR address in the “billing” section and the FFL DEALER’S address in the “shipping” section. If you don’t know your FFLs address, that’s okay. You can send the information later.

 

3)     After check out, make sure to contact your FFL dealer to ensure they will receive your shipment for you (most do this for a small fee, but you should always double check).

 

4)     Have your dealer send us a copy of their FFL to FFL@CharliesCustomClones.com. Charlie’s does not reach to your FFL (MAKE THEM EARN THEIR FEE!!!)

 

5)     Be patient! In order to ensure we remain compliant with all federal laws, our compliance department is kept separate from our sales and operations team. Please allow a few days for our compliance officer to verify all of your dealer’s documents and ensure all federal laws are being observed. You should hear from our compliance department within 3-4 business days. If not, feel free to reach out for a status update.

 

That’s it! We try to make this process as simple as possible for our customers, but if you are unfamiliar the process or have any other questions, please visit our How to Buy a Firearm page for more details.

California and New York residents please, click here. The process may be different due to state specific laws.

NOTE: The free shipping option does not apply to full rifles, unless purchased with a riflescope.  If you choose free shipping at check-out, we will bill you for shipping later.