All Components in the Zeus Arms Complete Lower Receiver are listed below: Zeus Arms "Artemis" AR-15 Lower Receiver Zeus Arms "ARTEMIS" AR-15 Lower Receiver. The Artemis series lower is cut from a solid block of 7075 Aluminum. It also shows no visible markings on the sides of the receiver maximizing the amount of space for customization. All of our lowers feature a more aggressive magwell flare and a upper retention threaded hole. 7075-T6 aluminum Precision broached magazine well Accepts all mil-spec components 100% USA Made Zeus Arms AR15 / M16 Buffer Tube Kit W/ Stock - Standard Carbine Mil-Spec dimension 7075-T6 6 position buffer tube - hard coat anodized Carbine buffer - 3.0 ounce Castle nut - phosphate coated Endplate - mil-spec phosphate coated Buffer spring - standard music wire M4 Carbine Stock 100% USA Made Zeus Arms lower parts kits contain all high quality, 100% USA produced components, manufactured to our exacting standards. Each kit is guaranteed to fit your mil-spec dimension lower receiver. Hammer Trigger Disconnect Bolt catch Bolt catch detent Selector Selector detent Magazine catch assembly Fire control group pins (2) Takedown pin Pivot pin Pivot pin detents (2) Buffer retainer pin Complete spring kit Trigger guard assembly A2 pistol grip assembly 100% USA Made