Lower Receiver: Sons of Liberty Gun Works Forged Lower ReceiverMaterial: Made from Mil-Spec 7075-T6 aluminum Cerra Forge forgingsFinish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodic Coating, Flat Black Dye, Non-Reflective, NiAc SealContour is fully machined leaving no flash marks from the forging.Hidden lowers are cut with M16 auto pocket.Safe, Fire, and Full Auto Pictograms.Rebellious Stripes Roll MarkTEST FIRE DISCLAIMER: