Ballista springs can be attached to an incomplete light or heavy ballista to create an unstrung light or heavy ballista, respectively. Attaching a light one requires level 47 in fletching, granting 15 experience in doing so. Attaching a heavy one requires level 72 in fletching, granting 30 experience in doing so.
| Graph IRI | Count |
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| http://dbkwik.webdatacommons.org | 32 |