The RL556v3™ features Polymer80’s proprietary polymer composite, a solid core design, flared magwell, and beefier mil-spec buffer tube housing. The pistol grip area features a unique threadless design specific to Polymer80 rifle lowers.The kit includes:

• 80% Polymer AR15 Lower Receiver (Mil-spec)
• Polymer Jig
• Trigger Hole Drill Guide
• Drill Bits and End Mill