7075 Aluminum Lower Receiver ForgingThis is the same forging that all manufacturers use as raw material to produce their forged receivers. Not considered a Firearm by the ATF until after it is machined. A great conversation piece, or if you are feeling ambitious you can use this forging to machine your own functional receiver. Machining the AR15 Lower Receiver Forging by Ray Brandes tells you everything you need to know.
Slick Side Forged UpperPrecision manufactured from forged 7075-T6 aluminum, or slick-side forged uppers are coated in Type III hard anodized and ready for your build. Specs Weight: 6.112 ounces 7075-T6 Aluminum Type III hard anodized