GunGravity.cs

// Apply force - More up assist depending on y position
var assistPoint = Mathf.InverseLerp(0, _maxY, _rb.position.y);
var assistAmount = Mathf.Lerp(_maxUpAssist, 0, assistPoint);
var forceDir = -transform.forward * _forceAmount + Vector3.up * assistAmount;
if (_rb.position.y > _maxY) forceDir.y = Mathf.Min(0, forceDir.y);
_rb.AddForce(forceDir);

// Determine the additional torque to apply when swapping direction
var angularPoint = Mathf.InverseLerp(0, _maxAngularVelocity, Mathf.Abs(_rb.angularVelocity.z));
var amount = Mathf.Lerp(0, _maxTorqueBonus, angularPoint);
var torque = _torque + amount;

// Apply torque
var dir = Vector3.Dot(_spawnPoint.forward, Vector3.right) < 0 ? Vector3.back : Vector3.forward;
_rb.AddTorque(dir * torque);