I have a lot of wild rose and snow berry bushes (1/2 in dia stocks) that need something better than a string or a hedge trimmer. So, if a bush bar is an option for the electric chain saw -- that would be soooo sweet.
A bush bar has two 1-1/2 inch stops on both sides of the bar located together on the first 1/3 of the return portion of the bar to stop & cut bush into pieces before it is pulled into the chain saw drive gear. You normally do not cut bush and big trees with the same bar. Yes, I have heard it called a brush saw rather than a bush saw.