How to alter this instantiate function to accept poolboss

PoolBoss uses Transform component as both input and input, instead of GameObject like Instantiate. So if you wanted to get to the Rigidbody, you'd do it like this, assuming projectile is a GameObject (you didn't specify what it was):

var spawnedTransform = PoolBoss.SpawnInPool(projectile.GetComponent<Transform>(), transform.position + transform.forward, transform.rotation);
if (spawnedTransform != null) {  // check if it was actually spawned or not (in case you hit your pool item max).
    RigidBody bullet = spawnedTransform.GetComponent<Rigidbody>();
    // now the rest of your code as is.
    bullet.AddForce(transform.forward * bulletImpulse, ForceMode.Impulse);
}


Sorry for the late response. I didn't see it this morning when I checked for some reason.