Armaspec .223/5.56mm Lower Parts Kit SS/Black. 223/5.56 is an excellent purchase. This kit makes it easy to start building your own AR 15 as it includes many of the components you need to outfit the lower. Plus Armaspec uses stainless steel for each part to help prevent corrosion and damage due to regular use ensuring your build lasts as long as possible. NOTE: This is "NOT" a complete lower parts kit. This is a LPK without FCG and Grip. This Kit does not include the Pistol Grip Trigger and Hammer Trigger and Hammer Springs Disconnect and Disconnect Spring Specifications for Armaspec .223/5.56mm Lower Parts Kit: Manufacturer: Armaspec Color: Stainless/Black Caliber: 5.56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Country of Origin: USA Features of Armaspec .223/5.56mm Lower Parts Kit Includes Armaspec Enhanced Lower Parts Compatible with most AR-15 lowers made in specialized factories Lifetime Warranty Package Contents: Armaspec .223/5.56mm Lower Parts Kit Armaspec ARM152-BLK: .223/5.56mm Lower Parts Kit SS/Black