The Radical Firearms M-LOK RPR Handguards are manufactured from high quality components at a great price. These tough rails offer a slim profile. Large cooling holes along the rail reduce weight and aid in rapid cooling. Mount your favorite accessories to any of the M-LOK positions along the 3, 6, and 9 o’clock of the rail or take advantage of the uninterrupted M1913 Picatinny top rail. Barrel nut and all mounting hardware included. Features: – 4140V steel barrel nut – M-LOK compatible – MIL-SPEC Picatinny top rail – Type III Class 2 hardcoat anodized finish