The Riser rail fits to most 11 mm Dovetail rail on the gun actions. Its has a weaver/picatinny rail angled at 20 MOA to help reduce adjustments to zero rifle scope. It raises mounting points by approximately 20 mm.
Will fit AA S400/410/510, HW100 and many other rifles. Please not rail has 10 mm clearance above rail to fit a magazine. May effect some models including FX models.