Where the island's weapon components and recipes fit into progression.
At level 75, Singsing offers Rise and Fall of the Elroki Tribe for new A-grade weapon components. Dinn offers A Powerful Primeval Creature for recipes, plus Defeat the Elrokian Raiders. Elrokian Hunters starts at Marquez at level 75 and unlocks the trapping tool. These are different objectives, so check the corresponding quest before hunting.
A Powerful Primeval Creature names Dinosaur Tissue and Dinosaur Eggs as collection objectives. Its narrative describes a reward for one egg and 150 tissues; the target list includes Velociraptor, Pterosaur, Ornithomimus, Deinonychus and the egg target. This does not establish that any chosen recipe always costs exactly that amount. Check Dinn’s actual reward choice before committing the collection to a specific crafting plan.
Rise and Fall of the Elroki Tribe uses Bones of a Plains Dinosaur and names Pachycephalosaurus and Wild Strider as targets. Its research and tribal objectives are separate from Dinn’s tissue-and-egg collection. If you move between areas, check which quest item each target can advance. Do not assume that all dinosaur bones or weapon components are interchangeable turn-in items.
A recipe and a weapon component are only parts of a crafting plan. Open the exact weapon’s recipe, check its playable variant and list the remaining materials before valuing a hunting reward. Keep uncertain reward choices out of a fixed cost estimate. It is more useful to know which quest supplies the category you need than to promise a finished weapon after an unsupported number of kills.