The Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver ONLY comes complete with essential parts as described: Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver Only The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver Only represents a critical starting point for the custom builder seeking a durable, semi-finished platform. This component is designed for individuals who want to complete a receiver from an 80% stage, offering a foundation that requires additional machining and finishing. As a product from Polymer80, a manufacturer known for precision-centric polymer components, this lower receiver is engineered to meet the specifications of the AR15 platform while providing the flexibility of a build-it-yourself project. The RL556V3 is specifically the Rhino variant, which incorporates subtle ergonomic enhancements over standard 80% lowers, including an integrated trigger guard and a reinforced rear takedown pin boss. This receiver is sold as a raw, unfinished part and is intended for use by those who possess the requisite tools and knowledge to complete it in accordance with all applicable federal, state, and local laws. Overview The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver Only is a polymer-based, semi-finished lower receiver that has not yet been machined to accept fire control components. It is classified as an 80% receiver because it lacks critical fire control cavities, meaning it is not a firearm under federal law and can be shipped directly to your door without an FFL transfer at the time of purchase. This unit is compatible with standard AR15 upper receivers, buffer tubes, and lower parts kits, though the end user is responsible for completing the receiver to a functional state. The Rhino designation refers to the specific geometry of the magazine well and grip area, which Polymer80 has textured and contoured for improved handling during the finishing process. This receiver is made from a proprietary reinforced polymer blend that resists impact and environmental stress, ensuring longevity after the build is complete. Features & Specs Mil-spec dimensions for compatibility with all standard AR15 components, including drop-in trigger groups and pistol grips, after final machining is completed on the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver Only. Reinforced front and rear takedown pin lugs, with an integrated trigger guard that eliminates the need for a separate trigger guard installation on this 80% lower receiver. Textured grip area and flared magazine well for enhanced control during the finishing process and subsequent use, crafted from a high-impact, UV-resistant polymer compound. Weight: approximately 7.2 ounces (unfinished state). Material: proprietary Polymer80 reinforced polymer blend with glass-fiber content. Compatibility: accepts all standard AR15 lower parts kits, buffer tubes, and stocks after receiver is completed to 100% specification. Who It's For The Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver Only is intended for experienced builders and hobbyists who understand the legal and mechanical requirements of completing a firearm from an unfinished receiver. This product is not for first-time builders unless they have access to proper jigs, drill presses, or CNC equipment and are comfortable reading technical blueprints or instructional guides. It is ideal for those who wish to customize their lower receiver without the restrictions of a fully serialized component, or for individuals who want to build a spare receiver for future projects. This unit is also suitable for gunsmiths who need a consistent, high-quality 80% base for client builds, provided all state and federal regulations are followed. The Rhino variant is specifically appealing to users who prefer an integrated trigger guard and a slightly more ergonomic magazine release area, which reduces the need for post-completion modifications. Shipping & FFL Because the Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver Only is classified as an unfinished, non-firearm receiver (80% complete), it does not require transfer through a Federal Firearms License (FFL) holder at the time of shipment. This product can be shipped directly to your residential or business address, provided your state and local laws permit the possession and completion of 80% receivers. However, it is the sole responsibility of the purchaser to verify that owning, machining, and completing this receiver into a functional firearm is legal in their jurisdiction. Some states, including but not limited to California, New York, New Jersey, Connecticut, and Washington, may have restrictions or outright bans on 80% receivers. Additionally, once this receiver is completed by the end user, it must comply with all applicable federal regulations, including the requirement that the finished product is not transferred or sold without a serial number. By purchasing this product, you acknowledge that you are legally eligible to own a firearm in your state and that you will complete the receiver in compliance with all laws. We do not provide legal advice, and you should consult with an attorney if you have questions about the legality of 80% receivers in your area.

No. This product is a part or accessory and does not require an FFL for purchase or shipping.

While Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver ONLY is legal in most states, always verify your local laws before placing an order. We comply with all state regulations.

In most cases, yes — Glock-compatible frames are designed to accept Glock OEM and compatible magazines. Always confirm fitment in the product details.

That depends on your state’s concealed carry laws. Once properly serialized and registered, carrying may be allowed under state law.

We ship all over the USA within 1–3 business days. You will receive tracking once shipped. Delivery times vary by carrier and region.