This is Anderson’s Premiere Complete Lower Parts Kit Including their Stainless Steel Hammer and TriggerIf you are looking for a quality lower parts kit to build your AR-15 Lower, then check out the Anderson Manufacturing AR-15 Lower Parts Kit.  This is Anderson’s Premiere Complete Lower Parts Kit Including their Stainless Steel Hammer and TriggerFor over 50 years Anderson Manufacturing has provided their customers with quality manufacturing services.  Anderson Rifles builds all of their own parts and they utilize state of the art, computerized manufacturing process and quality control techniques. Anderson’s work force is comprised heavily of U.S. Military veterans and their unparalleled care and attention to detail ensures you will receive precision machined products that are perfect in every way. All of their products and components are proudly made in the USA! This pack contains all of the parts to assemble your new complete lower receiver and utilizes quality parts of the highest caliber including a stainless steel hammer and trigger.Manufacturer Number: AM556LWPARTSKIT Stainless Steel Hammer and TriggerIncludes:Bolt CatchBolt Catch PlungerBolt Catch Roll PinBolt Catch SpringBufferRetainerBuffer Retainer SpringDisconnectDisconnect SpringStainless Steel HammerHammer PinHammer SpringMagazine CatchMagazine Catch ButtonMagazine Catch SpringPistol Grip (A2 style)Pistol Grip Lock WasherPistol Grip ScrewPivot PinPivot Pin DetentPivot Pin Detent SpringSelectorSelector DetentSelector Detent SpringTakedown PinTakedown Pin DetentTakedown PinDetent SpringStainless Steel TriggerTrigger GuardTrigger Guard Roll PinTrigger PinTrigger Spring