Milled from aircraft grade 6061 T6 aluminium the Velocity QD End Plate is the perfect upgrade for your AR-15 rifle. Our QD End Plate is compatible with and mil spec AR-15 or AR-10 lower receiver. Our design features a quick detach or attachment point for push button slings and a counterbore milled into the plate to help align and hold the rear takedown pin detent spring in place during installation.