The Knight's Armament SR-15 stripped lower receiver — KAC's "Stoner Rifle" marked, 7075-T6 aluminum, forged and finished to military TDP specifications.
The KAC SR-15 lower is one of the better-regarded AR-15 lower receivers ever produced. Knight's Armament forged these from 7075-T6 aluminum — the same alloy and temper used in military-contract M4 and M16 receivers — and finished them with Type III Class 2 hardcoat anodizing for a durable, uniform matte surface. The "Stoner Rifle" rollmark on the magwell distinguishes this as a KAC product, and the fit and finish reflect the tolerances KAC maintains across its military and commercial production lines.
For clone builders, the SR-15 lower serves as a high-quality foundation for any AR-15-pattern build. It is not a program-specific lower (the M110 SASS, Mk11, and SR-25 have their own dedicated KAC lowers with different markings and dimensions), but it is a KAC-manufactured receiver that carries the Stoner Rifle lineage. All pin-hole dimensions are traditional mil-spec, so any standard mil-spec trigger group, safety selector, bolt catch, and magazine release will drop in without modification.
The "virgin" designation means this receiver left KAC's factory as a stripped lower — it was never assembled into a rifle. Under federal law, a receiver that has never been part of a rifle may be built as either a rifle or a pistol. Builders planning a pistol-length or SBR configuration should verify compliance with their state laws before building.
We carry these when we can find them. Once they're gone, they're gone — KAC is not making more. Grab one while they're here.
This item is a serialized firearm receiver and must ship to an FFL holder. No civilian exceptions.
1) Check your state laws to confirm the item is legal in your state.
2) Have your FFL dealer send a copy of their FFL to Charlie's.
3) Be patient — you should hear from our compliance department within 3–4 business days.
Please click the "Buying a Firearm" tab at the top of this page for more information.
This item cannot be shipped to California.
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.
Knights Armament (KAC)
Knights Armament (KAC)
Knights Armament (KAC)