Every piece of gear that I have ever laid hands on from Gear Sector has been very functional and well designed which makes it easy to be intrigued by their upcoming Modular Free Float Tubes for the AR-15.
Here is what we know: they will support a line of modular bolt-on accessories and they will be relatively light weight. The 7″ carbine hand guard weighs just 5 ounces (without barrel nut). They are made in the now common, slick sided configuration. These are definitely worth keeping an eye on.
Check out GearSector.com.