ARMSLIST – For Sale: Anderson AR-15 Stripped Lower Receiver

For the shooter building a custom AR-15 platform from the ground up, the Anderson Manufacturing stripped lower receiver provides the legal and structural foundation for your project. Whether you are assembling a dedicated home defense carbine, a precision target rifle, or a general-purpose hunting setup, this mil-spec component is the starting point recognized by U.S. firearms owners for its reliable fit and finish. As a licensed FFL retailer, we offer this receiver as a blank canvas for your build, requiring no serialized component beyond this one to begin your ATF-compliant assembly.

What This Product Is and Who It Is For

The Anderson AR-15 stripped lower receiver is the serialized, federally regulated part of the AR-15 platform. It is the component that houses the trigger group, magazine well, and buffer tube assembly, and it is the part that must be transferred through a licensed firearms dealer. This product is for the hands-on shooter who prefers to select each component of their rifle, from the barrel and handguard to the stock and optics. It is equally suited for the first-time builder who wants to learn the platform’s mechanics, the experienced competitor who demands specific trigger and stock configurations, and the collector who values a clean, functional foundation for a period-correct or modern build. It is not a complete firearm, but the core component that defines your rifle’s legality and compatibility.

Key Specifications (Inferred from Product Name and Industry Standards)

• Caliber Compatibility: Multi-caliber; designed for 5.56 NATO / .223 Remington, but compatible with other AR-15 calibers (such as .300 Blackout, 9mm with conversion block, or .22 LR with dedicated upper) using appropriate upper receivers and magazines.
• Capacity: Magazine capacity is determined by the magazine used; standard AR-15 magazines range from 10 to 30 rounds. The receiver accepts all standard AR-15/M16 magazines.
• Barrel Length: Not applicable to the stripped lower; barrel length is determined by the upper receiver assembly you choose to install.
• Finish: Hardcoat anodized black per MIL-A-8625 Type III, Class 2 specification. This provides corrosion resistance and a durable, non-reflective surface.
• Weight: Approximately 8.8 ounces (0.55 lbs) as a stripped receiver, without trigger group, stock, or buffer tube.
• Sights: None included; the stripped lower does not include any sighting system. Iron sights or optics are mounted on the upper receiver.
• Material: Forged 7075-T6 aluminum, a standard for mil-spec AR-15 receivers due to its strength-to-weight ratio.
• Trigger Group: Not included; uses a standard mil-spec trigger pocket compatible with drop-in triggers and standard trigger groups.
• Safety Selector: Not included; the receiver is machined for a standard mil-spec safety selector (safe/semi/full-auto cut for compatibility, but semi-auto only in function).
• Buffer Tube Threads: Standard 1.250-18 UNEF threads for mil-spec buffer tubes.
• Magazine Catch: Accepts standard mil-spec magazine catches and release buttons.
• Bolt Catch: Accepts standard mil-spec bolt catch assemblies.
• Rear Takedown Pin: Standard 0.250-inch diameter pin holes.

Feature Deep Dive

The Anderson stripped lower receiver is forged from 7075-T6 aluminum, a material chosen for its ability to withstand repeated stress without deformation. This forging process aligns the grain structure of the metal, resulting in a receiver that is denser and stronger than billet-cut alternatives at a similar price point. The hardcoat anodized finish is not merely cosmetic; it creates a surface that resists scratches, solvents, and environmental moisture, which is particularly relevant for shooters in humid climates or those who store their rifle in a vehicle or safe for extended periods. The receiver’s dimensions are held to mil-spec tolerances, meaning that parts from major manufacturers—such as Colt, BCM, Aero Precision, and Geissele—will fit without excessive filing or fitting.

The trigger pocket is machined to accept both standard mil-spec trigger groups and many aftermarket drop-in cassette triggers. This allows you to choose a trigger weight and pull style that suits your shooting discipline, whether that is a crisp 3.5-pound match trigger for precision work or a standard 7.5-pound GI trigger for general use. The pocket depth is consistent, which reduces the likelihood of trigger over-travel issues or hammer engagement problems. The magazine well is flared slightly at the bottom to aid in rapid reloads, a small but appreciated detail for competition shooters or anyone practicing tactical reloads under time pressure.

The receiver’s rear lug and pivot pin holes are reamed to precise diameters, ensuring that upper receivers lock up without wobble. A loose fit between upper and lower can affect accuracy potential, especially with optics, and the Anderson receiver is designed to minimize this play. The bolt catch recess is cut cleanly, allowing for smooth engagement of the bolt catch and easy release with a gloved hand. Additionally, the receiver is marked with the manufacturer’s name, model, and serial number in a clear, legible font that meets ATF marking requirements, which is important for legal compliance and resale value.

One often-overlooked feature is the integral trigger guard. The Anderson lower includes a machined trigger guard that is part of the receiver itself, eliminating the need for a separate trigger guard pin and reducing the risk of the guard breaking or bending during hard use. This also provides a slightly larger opening for gloved fingers, a practical benefit for shooters in cold weather. The buffer tube threads are cut cleanly and consistently, which prevents cross-threading when installing a buffer tube and stock assembly. This attention to threading detail reduces the chance of a wobbly stock or damaged threads during assembly.

For the builder who intends to use a drop-in trigger, the receiver’s trigger pocket is compatible with popular units from Timney, TriggerTech, and LaRue. The safety selector hole is drilled and reamed to accept standard mil-spec selectors, and the detent channels are cut to ensure positive engagement without excessive slop. The magazine release button hole is positioned so that standard releases work without binding, and the bolt catch pin hole is properly aligned to accept the roll pin or screw-in pin, depending on your preferred assembly method. These small but critical details mean less frustration during the build process and a more reliable final product.

Finally, the Anderson stripped lower receiver is covered by a limited lifetime warranty from the manufacturer. This warranty covers defects in material or workmanship, which is a strong indicator of confidence in the forging and machining process. While no warranty covers wear from normal use or modification, the fact that Anderson stands behind their product for the life of the receiver is a consideration for the long-term owner. This warranty is transferable with the receiver, which can be a selling point if you ever decide to sell the lower or the completed rifle.

Ideal Use Cases

• Home Defense: Build a lightweight carbine with a 10.5- to 16-inch barrel, a red dot sight, and a reliable weapon light. The stripped lower allows you to choose a short-stroke gas system or a standard direct impingement setup, depending on your preference for reliability and recoil.
• Range and Target Shooting: Assemble a precision upper with a heavy barrel, a free-float handguard, and a high-magnification scope. The mil-spec lower provides a stable platform for accuracy testing and bench rest shooting.
• Hunting: Configure the rifle for varmint or medium game hunting using calibers like .223 Remington, .300 Blackout, or 6.5 Grendel. The stripped lower allows you to select a stock with a shorter length of pull for hunting with heavy clothing or a compact stock for blind hunting.
• Competition: For 3-gun or tactical matches, the lower can be equipped with a competition trigger, an extended magazine release, and an ambidextrous safety selector. The flared magazine well aids in fast reloads, and the mil-spec dimensions ensure compatibility with aftermarket parts.

Compatibility Notes

• Ammunition: The stripped lower does not directly determine ammunition compatibility; that is dictated by the upper receiver and barrel. However, the lower is designed to function with any caliber that fits within the AR-15 magazine and bolt face constraints. For 5.56 NATO, use .223 Remington or 5.56 NATO ammunition. For .300 Blackout, use dedicated .300 Blackout magazines to avoid feeding issues.
• Holsters: Not applicable. Holsters are designed for complete firearms, and this lower receiver is not a complete firearm. Once assembled into a rifle, holsters for AR-15s are typically for the entire rifle or for the upper receiver/barrel assembly in specialized cases.
• Magazines: Accepts all standard AR-15/M16 magazines from manufacturers such as Magpul, Lancer, Okay Industries, and Brownells. This includes 10-round, 20-round, 30-round, and 40-round magazines. Drum magazines designed for the AR-15 platform are also compatible, though fit may vary with certain drum designs.
• Accessories: The lower receiver is compatible with all mil-spec buffer tubes, stocks, pistol grips, trigger groups, and safety selectors. For non-mil-spec parts (such as PDW stocks or specific ambidextrous controls), verify compatibility with the manufacturer, as some require proprietary buffer tubes or receiver extensions.

Frequently Asked Questions

Q: How does shipping work for this stripped lower receiver to my location in the United States?
A: This product is a firearm (serialized receiver) and must be shipped to a licensed Federal Firearms License (FFL) dealer in your state. We do not ship to residential addresses. After you place your order, we will contact you to confirm your chosen FFL dealer. You must provide us with a copy of the dealer’s FFL license. We ship via UPS or FedEx with adult signature required. Shipping is available to all states where AR-15 lower receivers are legal, subject to state and local laws.

Q: What is the FFL transfer process? I have never purchased a receiver online before.
A: First, locate a local FFL dealer who is willing to accept the transfer. Contact them to confirm their transfer fees and policies. After you order from us, provide the dealer’s name, address, and FFL number. We will ship the receiver to them. Once it arrives, you will visit the dealer, complete ATF Form 4473, and pass a NICS background check. The dealer will then transfer the receiver to you. This process is standard for all firearm receivers and complete firearms.

Q: Is this stripped lower receiver compatible with .22 LR conversion kits?<br