Aero Precision APAR501197: The Aero Precision AR15 Complete Lower Receiver with Magpul SL-S Carbine Stock is the perfect upgrade for your AR build. This complete lower features an AR15 Gen 2 Lower and is upgraded to include an Magpul SL-S Carbine Stock.Includes: AR15 Gen 2 Lower Receiver - Cerakote FDE Magpul SL-S Stock Magpul MOE Grip Mil-spec Lower Parts Kit Carbine Receiver extension AR15 Carbine Buffer and Spring These parts are installed