The incomplete heavy ballista is a mid-stage Fletching product, made by attaching ballista limbs to a heavy frame at level 72 Fletching for 30 experience. It's tradeable on the Grand Exchange — see the live price & history chart above for its current value — with a buy limit of 8 every four hours. From here, attaching a ballista spring turns it into an unstrung heavy ballista, granting another 30 experience.
Grand Exchange price history
How to get the incomplete heavy ballista
The incomplete heavy ballista is created, not dropped or bought from a shop. Players attach ballista limbs to a heavy frame at level 72 Fletching (boostable) to produce it, earning 30 Fletching experience per creation.
Because it's fully tradeable, players who don't want to gather and combine the components themselves can buy a finished incomplete heavy ballista directly from the Grand Exchange instead.
What the incomplete heavy ballista becomes
The incomplete heavy ballista isn't the finished product — it's one stop in a longer Fletching chain. Attaching a ballista spring to it creates an unstrung heavy ballista, granting a further 30 experience.
Because each stage feeds directly into the next, an incomplete heavy ballista doesn't tend to sit in a player's bank for long — it's either freshly made or bought right before being carried on to the next step.