The NFA Review Channel covers the project between Angstadt Arms and KG Made Suppressors to produce a very sweet AR that includes a user-serviceable integral suppressor.
These blowback-operated ARs use Glock magazines to feed 9mm para into the pistol, rifle, and carbine which incorporates a suppressor tube made of Grade 9 titanium. An adjustable port system, Magpul MOE stocks (or Shockwave grip on the pistol) and Odin Works keymod hand guard with a top pic rail comes standard across all three models with an MSRP of $1995 (plus stamps).
They sound pretty neat. (Get it? Did you get it?)