Hennings Glock design extends the blade over the back of the slide for a longer sight radius and a larger sight reference for more precise shooting. Battlehook Glock is finished with Mil-spec Parkerized Bearcoat for durability and blackest possible surface. Battlehook Glock is available in 3 different heights to fit the various Glock models. The most common (6.5) is also available in two different notch widths; .150" and .180". The .180" width is called "Ultra Carry" and gives you a super fast and sight picture for concealed carry purposes.