The rules on page 40 of the Eldar book seem clear to me. It can either be used as a ranged weapon or a close combat weapon, as Magnus said, and it has the special close combat grab attack outlined in the rules on page 40.
I assume that the cause of your confusion is
this question from Scream combined with Primarch's answer on the following page? If so, then this will be resolved when the errata/changes are all included in the rules and the revised books are uploaded.
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