Polymer80 RL556V3 – RHINO 80% AR15 Lower Receiver ONLY

The most popular polymer AR-15 80% lower.

Worried about cutting and drilling a metal 80% lower? Try this instead! The “RHINO” 80% lower is made from a glass-reinforced nylon composite, 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 beginner builders 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