It's just the bottom metal that bolts through the stock and into the receiver. It's two bolts. Most of the receiver kits also contain two bedding pillars. These are an accuracy enhancer and require additional modification to the stock. You basically over-drill the stock bolt holes bigger and epoxy the pillars in place. They prevent crushing of the stock and allow a consistent torque value to be applied to the stock screws every time they are reassembled.
Brownells is an excellent place to shop for the magazine kits as well as the epoxy bedding to glue in the pillars. Youtube, MidwayUSA, and Brownells should all have videos on pillar bedding a bolt rifle.
Most rifle scopes are engineered for rifle recoil. I doubt you will have any problems with a scope. Use blue Loctite on the rings.
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