The 29246 action rail is only compatible with Accuracy International AXMCs. It is made from aluminum and has steel inserts that interface with cutouts in the receiver. All of the needed hardware for attachment is included. This rail is made to replace the 30 MOA rail that comes stock on the AXMC. This is an ideal replacement if you want to change your forend to the version with the integrated arca and picatinny rails. The integrated picatinny rail on the one piece forend rail has a 20 MOA cant. For alignment you should match the angle of your action rail and forend rail. It is very important when using night vision, thermals, or prisms in front of your optic that everything is on the same plane.