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.Rails: M-LOKType: HandguardFirearm Type: AR RifleFirearm Model: AR-15Material: AluminumFinish: Black Hardcoat AnodizedFeatures: M-LOKPositions: 1Free Floating: Yes