The Armaspec Superlight Lower Parts Kit delivers high-quality components with precise manufacturing for .223/5.56 caliber firearms in a sleek black finish.Armaspec Superlight Lower Parts Kit (ARM252-BLK)Compatible with .223/5.56 caliber firearmsPrecise manufacturing for optimal fit and functionLong-term reliability you can count onDurable construction for years of serviceBlack anodized finishIdeal for maintaining and upgrading AR-15 style firearms this lower parts kit provides the durability and excellent build quality that Armaspec is known for.