ZEV Technologies Wedge Lock free-float handguard attaches to the receiver by an innovative system built around a lightweight titanium barrel nut (included) and the two-piece Wedge Lock system tightens down securely with only one screw. It has with narrow cross-sections which provides for an excellent ergonomic grip while the M-LOK negative space mounting system provides a smooth surface. The Wedge Lock system has a black nitride coating. It is not designed for a suppressor to be mounted under the hand guard.