Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver with Jig | Polymer80
Specs at a glance
About this product
The Polymer80 RL556V3 – RHINO is a Gen 3 80% AR-15 lower receiver designed for builders who prioritize a lightweight, durable platform. It includes the required jig for completion. This version features improved tolerances over its predecessor, as noted by our staff. Weighing just 5.5 oz on our scale, it’s a solid foundation for a custom rifle.
Key Highlights
- Gen 3 RHINO design with enhanced structural reinforcement.
- Includes a precision-machined aluminum jig for accurate milling.
- Compatible with mil-spec AR-15 parts kits and uppers.
- Lightweight polymer construction reduces overall rifle weight.
- Reinforced critical stress points for improved durability.
Product Details
| Model | RL556V3 – RHINO |
| Material | High-Strength Polymer |
| Completion Required | 80% (Fire Control Pocket) |
| Includes | Receiver, Jig, Drill Bits |
| Compatibility | Mil-Spec AR-15 |
| Weight (measured) | 5.5 oz |
| Color | Black |
What Buyers Ask
What tools are needed to finish this 80% lower?
You will need a drill press or router, a vise, and basic hand tools. The included jig guides the milling process for the fire control group pocket. A 5/32″ and 3/8″ drill bit are included for the trigger and selector holes.
Is this compatible with standard AR-15 parts?
Yes. The RL556V3 is designed to accept all mil-spec AR-15 lower parts kits, buffer tubes, and uppers. It follows the standard AR-15 pattern for a reliable fit.
How does the polymer hold up compared to aluminum?
The polymer is reinforced at the buffer tube tower, takedown pin areas, and pistol grip. It is designed for durability while offering a significant weight reduction. For standard use, it provides a reliable and lightweight alternative.
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What's in the box
- Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver with Jig | Polymer80