Grinchfinger are a band from Macon, Georgia and they play grindcore! I don't know very much about them, but I really don't need to when the music is this good. They play a style of grind that is influenced by many other genres. Like on the song "Bacterial Holocaust" I hear a death metal influence, and one of the many vocal styles sounds very black metal. Their style is also very influenced by mince bands such as Agathocles, Archagathus, etc., I know a lot of people aren't really into mince, but I love it! I also really like the "production" of Acid Satan and the drums sound especially killer. My favorite songs on Acid Satan are "Fear of Industry", "Pig Sticker", and "Endless Ritual". All of these eight songs are great and I highly suggest that you check Grinchfinger out.
Download Acid Satan for free from their Bandcamp here.