ZRODelta Mission Ready LVOA Rail Black Medium. It is the customers responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16in. Federal NFA regulations are applicable to this item. Specifications for ZRODelta Mission Ready LVOA Rail: Manufacturer: ZRODelta Color: Black Finish: Anodized Fabric/Material: 6061-T6 Aluminum Handguard Length: 11.5 in Gun Rail: M-LOK Last Chance: Yes Package Contents: ZRODelta Mission Ready LVOA Rail ZRODelta 7048-0029-9000: Mission Ready LVOA Rail Black Medium