I am offering three M1 Garand operating rods . All are in serviceable condition , all of them were ok my my gauge but I measured the pistons for you anyway .
1. Springfield -6 curve side , olive color ,
2. HRA , blackish to grey color ,
3.IHC , Grey(ish) in color ,
EDIT to add ; this offer is withdrawn , wrong piston measurements .
Thanks , Jack