Hi, as the topic says, I need help making a projectile motion.
I have a point A and a point B in workspace and I need a ball to be projected from point A to point B
Any help would be appreciated 
There are infinite possible trajectories unless you also specify a speed or a launch angle. Which do you want?
Well, if you have a ready trajectory, then just tween that thing.
Calculate speed of the bullet at each step and use linear tweening (Because those curvy ones are less accurate). And do that for every trajectory point.
Just use LineForces. They are the most reliable, as they use real gravity calculations and stuff, just make the magnitude low so it can be affected by gravity and fall down like a real projectile.