Rectilinear stock subassembly

The utility model provides a rectilinear stock subassembly, it includes a stock shell and a stock subassembly, this stock shell has a receiving channel, this stock subassembly includes an action bars, two block component and two elastic element, each should stop that component pivot ground connected in the lower tip of this action bars, each this elastic element sets up in between each lower tip that should stop component and this action bars, the lower tip of this action bars of this stock subassembly inserts this receiving channel through the upper shed of this stock shell, each should block the component inner wall extrusion of this stock shell, so that each this elastic element is by extrusion deformation, when the lower tip of this action bars under shed through this stock shell exposes this receiving channel, each this elastic element resumes to original state and makes each should block that the component expanded, and this action bars keeps this receiving channel at this stock shell, become the die ca