Mako AR15 Magwell Grip, Black. Transform your existing magwell into a fast action, ergonomic grip. Fits Forged Lower Receivers. Not recommended for Billet Receivers. Mounts directly below the receiver’s magwell to provide a large, beveled mag opening for rapid magazine changes, as well as a natural hand position for more secure shouldering while firing. Lightweight and easy to install. May require some shaving of the inside lips of the Magwell Grip for an exact fit. No modification to your firearm is required.