The Strike Industries M4 Quad Rail Handguard features a patent pending mounting system for easy drop-in installation and is constructed from aerospace grade aluminum for lightweight durability in a sleek design.Strike Industries M4 Quad Rail Handguard - 8.49" lengthAerospace grade aluminum construction for lightweight durabilityMil-spec Picatinny rails at 3 6 9 and 12 o'clock positionsPatent pending drop-in installation and removal systemTwo integrated QD (Quick Detach) socketsCompatible with AR rifles and M4 platformPerfect for tactical applications and customization this quad rail system provides multiple mounting options for weapon lights lasers foregrips and other accessories while maintaining a secure reliable platform.