From the manufacturer
BAD-EMMR-L-B (Enhanced Modular Magazine Release - Large Finger Pad - Black) for the AR15/AR10.
Precision CNC Machined for billet 7075-T6 Aluminum in an anodized BLACK finish, the BAD-EMMR features an unique, patent pending three sided dovetail finger pad attachment mechanism that allows for maximum strength, an almost uninterrupted finger pad face for maximum design aesthetics, light weight and low profile design. The interchangeable finger pads offers excellent ergonomic feel and ease of operation without shifting grip position. If you are looking for maximum flexibility, robust design and unparalleled design aesthetics, the BAD-EMMR is the ultimate extended magazine release for you.