Description

Polymer80 RL556V3 – Rhino 80% AR15 Lower Receiver and RL556v3 Jig Kit Bundle

If you’ve been looking to build an AR-15 from the ground up, the polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is a solid starting point. This bundle pairs the popular Rhino 80% lower receiver with the dedicated RL556v3 jig kit, giving you everything needed to complete the lower without guesswork. It’s a hands-on project for anyone who wants to understand their rifle inside and out, and it fits right into a weekend workshop session.

Overview

The Polymer80 RL556V3 Rhino 80% lower receiver is machined from reinforced polymer, designed to accept standard AR-15 parts kits and buffer tubes. It comes as an 80% blank, meaning the fire control cavity is not fully milled—you’ll finish it using the included jig kit. The bundle simplifies the process: the RL556v3 jig provides drill guides and templates specific to this lower, reducing the chance of errors. This is a complete kit for building a custom AR platform, and it’s compatible with most mil-spec uppers and lower parts. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is a package deal that saves time sourcing separate components.

Features & Specs

• Reinforced Polymer Construction: The Rhino lower is built from impact-resistant polymer with integral steel trigger pin inserts and a threaded rear takedown pin detent. It’s lighter than aluminum but holds up to standard use.
• Integrated Jig Kit: The RL556v3 jig includes hardened steel drill bushings, alignment pins, and a clamping block. It’s designed specifically for this lower’s geometry, so you don’t need to modify the jig for fitment.
• Compatibility: Accepts standard AR-15 lower parts kits, buffer tubes, and pistol grips. Works with both rifle and pistol buffer systems (check local laws for pistol builds).
• Finish Work Required: The lower arrives without the trigger pocket, safety selector hole, or fire control pin holes drilled. The jig kit includes clear instructions for completing these steps with a drill press or hand drill.
• Manufacturer Specs: Polymer80 is the OEM, and this is listed under their Build Kits category. It is not a finished firearm and requires additional machining.

This bundle is a practical choice for anyone who wants to learn the mechanical side of AR-15 assembly. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle gives you the raw materials and the tooling to complete the job.

Who It’s For

This bundle is for DIY builders who are comfortable using a drill press or hand drill with basic metal-working skills. It’s not a drop-in product—you’ll need to spend a couple of hours finishing the lower. If you’ve built an AR-15 lower before, this will feel familiar. If you’re new to 80% builds, the included jig simplifies the process, but you should still read the instructions thoroughly. It’s also a good fit for shooters who want a custom lower without buying a fully assembled receiver, or for those who prefer polymer over aluminum for weight savings. The polymer80 rl556v3 – rhino 80% ar15 lower receiver and rl556v3 jig kit bundle is not intended for FFL dealers or those seeking a ready-to-fire receiver.

Shipping & FFL

This 80% lower receiver is not classified as a firearm by the ATF and does not require transfer through an FFL dealer. It can be shipped directly to your door in most states. However, you are responsible for knowing and complying with all local, state, and federal laws regarding the completion and ownership of an unfinished receiver. Some states or municipalities may have restrictions on 80% lowers or require serialization after completion. We recommend checking with your local law enforcement or legal counsel before ordering. Once you complete the lower, it becomes a firearm and must comply with all applicable laws in your jurisdiction. We do not provide legal advice, and by purchasing this bundle, you acknowledge that you are solely responsible for lawful possession and use.