The Aero Precision AR-15 Complete Lower Receiver is the perfect base for your custom AR-15 build. This complete lower features AR15 Gen 2 Lower and is upgraded to include a MOE SL® Grip and MOE SL-S®Carbine Stock. INCLUDES AR15 Gen 2 Lower Receiver MOE SL® Grip MOE SL® MOE SL-S Carbine Stock Lower Parts Kit Carbine Receiver Extension AR15 Carbine Buffer and Spring Aero Precision’s AR-15 Gen 2 Lower Receiver sets the industry standard for quality and value. This lower receiver is machined to mil-spec dimensions and works with standard AR-15 components. It has been engineered with upgraded features, including an upper tension screw, threaded takedown pin detent recess and increased magwell flare.