Perfect for AR-15 rifles, Verge 15? M-LOK rails feature a skeletonized, low profile design to provide the most lightweight handguard possible. M-LOK cutouts ensure compatibility with all tactical M-LOK accessories and attachments, while a hard anodized aluminum construction produces durability you can trust in the field. Verge 15? M-LOK rails include a 7 slot M-LOK rail piece and hex key. Hard anodized aluminum construction M-LOK accessory compatible Material - Aluminum Rail type - Picatinny / M-LOK Length (in/mm) - 15 / 381in / mm Weight - 9.9oz