High quality components and precise manufacturing make TPS Arms parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on. This AR-15 lower parts kit includes the parts to build a complete lower receiver assembly (excluding pistol grip) using your existing stock assembly and lower receiver. All parts meet or exceed standard military specifications and are made in the USA.Features :Precise ManufacturingLong Term ReliabilityDurable Construction