AR-15 Complete Lower Receiver Tennessee Arms Company Polymer Multi-Cal. 5.56NATO/223Wylde/300AAC Blackout Ships within one day. NOTE: SHIPPING IS $35.00 for first item and $10.00 each for additional items for multiple orders. Complete Lower Receiver is Built in House Using our Stripped Hybrid Lower Mil-Spec Lower Parts Kit and a Commercial Diameter Six Position Collapsible Stock. Hybrid Nylon 6-6/ metal lower receiver. This receiver is designed to accept any mil-spec lower parts kit. All colors are molded directly into and throughout the entire receiver so you never have to worry about wearing it off unlike a painted finish. TAC Patent Pending design is Reinforced Nylon 6-6 with Marine Grade Brass threaded inserts molded into the material for strength and corrosion resistance. Using the Metal inserts into a high impact polymer receiver make this truly the Highest Strength/ Lightest weight hybrid receiver (5.6oz) on the market. receiver design is patent pending. Lifetime Warranty Receiver Constructed of High-Strength Nylon 6-6 and Marine-Grade Brass inserts All Metal Parts Kit Installed Six position Stock