US Patent 10132583 Bolt action chassis for rifles, shotguns, and muzzle loaders

A universal chassis for a firearm includes sidewalls. The sidewalls define a trigger well that is configured to receive a trigger mechanism. One of the sidewalls may define a cutout adjacent the trigger well. The chassis is configured to interchangeably receive a bolt action and a barrel for a shotgun, a muzzle loader, and a rifle. The cutout is sized and dimensioned to receive a lever arm of the bolt action.