My first AR-15 from Rock River Arms included the ERGO Ambidextrous SureGrip STANDARD model. So when my second AR-15 had only a hard, skinny pistol grip that was uncomfortable and no fun to use, I knew that I would eventually be upgrading to something better. Even though I have used a lot of Magpul products, I decided to stick with a company I knew would have a good pistol grip for me. This time, however, I decided to try out the "Tactical Deluxe" version of the ERGO Ambidextrous SureGrip. So, what makes this one "Deluxe"? The "Tactical Deluxe" version of the ERGO pistol grip is wider where your palm wraps around the grip, almost as if someone had squeezed an avocado pit up inside the STANDARD grip. The main reason I won't give this grip FIVE stars is because the STANDARD grip includes a storage compartment and the "Deluxe" version of the pistol grip does not.