The bcm mcmr is a free float handguard that eliminates loads from the barrel reducing the deflection for more accurate shooting.The mcmr features a m-lok compatible mounting system a steel barrel nut to resist movement under heat and has a black hard coat anodized finish.Rails: M-LOKType: HandguardFirearm Type: AR PlatformFirearm Model: AR-15Material: AluminumFinish: AnodizedFeatures: M-LOKPositions: 1Free Floating: Yes