WW2 German Ground Assault Badge of the Luftwaffe.
You can see this information on pages 78 and 79 of the book "" The pin is identical to the ones used by Assmann/Lüdenscheid. The Buntmetall catch is identical to those used by Friedrich Linden/Lüdenscheid (FLL) and other manufacturers from that area. This badge has not cutout over the eagle. This could be a sign of a different maker or a different production method.