---------------------------------------------------------------------------------------------------- This ARCA rail attaches to the forend of the Phoenix 2 stock only. Assembly is easy, just remove the MLOK rails from the stocks forend and drop the ARCA rail into the existing slots and bolt it down with the screws provided. Phoenix 2 short action length rail is 11.5", the Long is 10.75" and does not extend past the forend tip of the stock. Made from 6061T6 Aluminum Matte black, Hardcoat Anodized Manufactured in the USA