If you think about it, a coffee grinder attachment for your AR is the single most important accessory. I mean, you can fight without a laser, a white light, a LPVO, a flat dark earth MagPul stock, an aquarium bubbler, night vision and a bayonet. BUT YOU CAN'T FIGHT WITHOUT COFFEE!
Michael B
PS: Presently searching for a "Grey Man" stealth coffee grinder, perhaps disguised as a Velo Dog revolver...