I'll also concur that Brownell's Alumahyde II in Coyote matches Magpul FDE best. Duracoat's so-called Magpul FDE is way too light and people have reported needing to mix in a little bit of Matte Black to get the color right. Alumahyde takes forever to cure though without an oven so get ready to be without whatever your painting for at LEAST a week or two.