I am trying to make a humanoid robot. I have designed all the parts of the bipedal robot. However, I have only done so for one specific side of the robot, specifically, the right side. I am trying to find a convenient way to 'flip' the parts, such as the legs, shin, and feet so that they can be on the left side of the robot as well. Essentially, I want the two sides to be identical and should mirror each other on the midplane, most likely the front plane.

However, I am having trouble with 'flipping' the bodies of the part mid-plane.

I tried changing the view orientation of the front plane, top plane, and right plane by using the 'update standard views' feature, but that sadly didn't work. 

Please help.

Thank you.

(Attached is a part I would like to flip with respect to front plane.)