This fixture gives the barrel, receiver and trigger group the correct positioning during the bedding process. Trigger guard is held partially open by the steel U-shaped bar, while the barrel is centered in the channel using the aluminum spacer to create perfect stock-to-barrel positioning. Notes:Trigger guard is held partially open by U-shaped bar.Barrel is centered in channel by the Cylindrical Spacer.U-shaped bar is steel, 1-5/8" x 1 1/16"Spacer is aluminum, 1-1/2" diameter, 2-1/2" longInstructions for UseInsure that the firearm is unloaded and is pointed in a safe direction, disassemble the firearm removing the rear handguard and the trigger assembly (which may remain intact). Place the stock in a vise that is sturdy enough to hold the stock while applying the bedding compound. Apply the bedding compound to the stock. Slide the Cylindrical Fixture onto the barrel with the recessed shoulder facing towards the stock. The Cylindrical Fixture is prevented from sli...