Looking for a GBB M4 or M16 even with a 10.5" barrel that can take real steel furniture. No paint, no upgrades, no accessories preferred unless you have a Stark SE-5 or FAB AG-44S foregrip. And before you ask what on earth that picture is, it's what this build is going to end up like. A sort of "modern Thompson" for post-apoc events. I call it the "Chicago Keyboard".