How do you use the ballistic knife in black ops 4?

I never understood how to aim with it and need a bit of help

Solution 1:

The Ballistic Knife is projectile-based, meaning you have to account for the knife's drop - it doesn't travel in a straight path like a bullet does in this game. In addition to this, just like with a regular weapon, if the target is moving you need to account for this. However, you need to consider that the knife is considerably slower than a bullet, thus it might require you to aim where you think your target is going to be when the knife reaches the target.

Aside from this, you really need to practice using it to get a feel for it. As I said, the two biggest things is accounting for the drop, and predicting where your target will be when the knife reaches it.