If the cylinder is a complete assembly, to switch from Magnum cylinder to Long Rifle cylinder;
1.Ensure the revolver is completely unloaded.
2. Swing cylinder assembly out to left by pulling forward on ejector rod while pushing cylinder assembly out to left.
3. Using a small punch or wood dowel, push the cylinder locking plunger, located at the front of the frame just below the ejector rod assembly, into the frame enough that the cylinder assembly becomes free enough to move the cylinder crane to the left away from frame, DO NOT pull the cylinder assembly free from the frame until you use a thumb or finger to control the plunger assembly that you just pushed free of the cylinder assembly.
Failure to do so will result in parts of the cylinder plunger assembly flying off to parts unknown.
4. Once the original cylinder assembly is free of the frame, replace with the secondary cylinder assembly allowing slight resistance against the cylinder lock plunger.
5. Using your punch or dowel, push the lock plunger down into the frame while pushing the cylinder assembly to the right and into the frame recess until enough resistance is placed on the cylinder lock plunger by the cylinder assembly to retain the plunger under control and still allow you to remove your punch or dowel.
6. With the dowel free, continue feeding cylinder assembly into frame recess until the cylinder lock plunger snaps into plunger through hole in the cylinder assembly crane locking the cylinder assembly to the frame.
7. Test to ensure there is no binding of the replacement cylinder assembly, that the assembly will lock up and release from the frame without the use of excessive force on the ejector rod assembly, and that the cylinder will freely rotate during the cocking cycle before loading cartridges and atempting to fire revolver. HTH
