Putting in the thinner back strap returns the grip dimension to that of a standard Gen3 model, while setting up the thicker backstrap provides an additional 0.08 inches of grip circumference for shooters with bigger palms. No matter how the grip is configured, the grip angle remains precisely the same. https://glock01121.blazingblog.com/32891781/facts-about-where-can-i-buy-a-glock-online-revealed