The most popular polymer AR-15 80% lower.
Aluminum 80% lowers can seem challenging to fabricate. That's why Polymer80 introduced the "RHINO" RL556v3, a hugely popular, easier-to-machine 80% lower for the AR platform.
It's made from a glass-reinforced nylon composite. That's the same material used to make handgun frames. It's incredibly tough and capable of handling centerfire rifle cartridges, but it's a breeze to cut and drill for beginners with basic tools.
The RL556v3 features some improvements over its prior models: A threadless pistol grip reduces stress points within the receiver, and the buffer tube housing has been beefed up. It also features a flared magazine well for quicker reloads.
NOTE: Unlike other Polymer80 lowers and frames, this model does not include an 80% jig or tooling. This lower is compatible with most AR-type 80% jigs. An RL556v3 80% jig is also available.
"RHINO" Polymer 80% Lower: What's Included
- 80% Polymer AR15 Lower Blank (Mil-spec)
- Hex Key
- Set Screw
- Grip Nut
- Grip Screw
- Bolt Catch Pin
"RHINO" Polymer 80% Lower Features
- Works with standard / mil-spec lower parts kits
- Compatible with mil-spec buffer tube assemblies
- Uses standard pivot and takedown pins
- Works with standard AR uppers
- Accepts mil-spec magazines
- 100% made in the USA
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