The Next Level Ascend Armory mag release button (Mod1) has a concave face with horizontal grooves for improved grip. Slightly taller than a standard release button, the Ascend Armory mag release button is easier to index, but will not get in the way of the smooth operation of your rifle in the field. Upgrade your reloading experience with Ascend Armory by Next Level Armament. 6000 Series Aluminum Concave face for easy indexing Aggressive grooves provide positive engagement