Thread: Extended Mag Box and Action Bead Blasting - Rem 700

As funds permit I am gathering components for my next rifle being a 7mm saum built on a rem 700 short magnum action. I figure as part of the process I might aswell put on an extended mag box so there are no length issues. Plan is a 20” barrel running 160gr pills, probably the 168 VLD at this stage. Picture below shows the length of the current mag box. What should I be buying and where is the best place to buy it?

Second question. The action is black but the writing on it indicates it is stainless underneath. I presume this is a coating done from the factory by remington. I would like to leave the bolt black but return the action and floor plate etc to stainless/grey to match the barrel that will go on (Bartlein). Is this just a simple bead blast?

Thanks,
Dylan