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: This lower does not include an 80% jig. The RL556v3 Jig is available here. This lower also works with other AR-type 80% lower jigs.
"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
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.