Extended length provides large gripping surface for modern shooting techniques as well as additional accessory mounting positions; Mounts to most AK-47/AKM/AK-74 rifles with barrels between 16.75-18.25mm in diameter under the hand guard and greater than 13" in length; Full length, hard anodized, aluminum chassis clamps directly to barrel and provides for flex-free mounting as well as excellent heat shielding; Durable polymer outer cover; Slots at the three, six, and nine o'clock positions for mounting direct-attach M-LOK accessories or M-LOK 1913 Picatinny rail sections; Includes replacement polymer Top Cover; Compatible with UltiMAK Optics Mount top cover; Black Finish