Flavor of the month... M5 RAS isn't it. But, unless you need to mount optics or other sighting equipment far forward on your handguards, the M5 is a good railed handguard. It's easy to mount (doesn't require removing the delta ring assembly or dismantling your AR's barrel), works great for lights and VFGs, has perfectly in-spec rails, and is very light. True, it isn't free floated, but that won't really matter unless -- you guessed it, you need to mount optics forward of your flattop. Or if you're bothered by the VFG being able to torque the lower handguard around a bit (not a big deal, you can still drive your rifle with the VFG just fine).
For the vast majority of shooters requiring a rifle length railed handguard (and that don't want to disassemble their rifles), it's a good solution, especially at the prices I'm seeing on the EE now (including rail panels and VFGs). Did I mention it was light?