The carbine length free float quad rail is a 1-piece free float handguard for the ar-15 platform.Its quad rail design offers plenty of picatinny rail to mount accessories.The t-marked rails allow accessories to be removed and replaced with ease and ensures consistent replacement.A continuous top rail provides a monolithic look with a standard flat-top receiver.Rails: PicatinnyType: Quad RailFirearm Type: AR PlatformFirearm Model: AR15/M4Material: AluminumFinish: AnodizedFree Floating: Yes