hammer spring (mainspring) (also called the mainspring) that mounts on the lower tang and hammer stirrup. This spring provides the energy hammer to close on the firing pin when the trigger is pulled. This fits models 90 or model 06,62A THIS IS NOT THE GENERIC MAINSPRING THAT FITS THE LEVER ACTION RIFLES. IT IS SPECIFIC TO THE 1890, 1906, 62, 62A!!! NOTE: the 1906 pistol grip receiver has a longer hammer spring (mainspring) that is unique, see parts list
