I recently picked up a 1903-A1 Springfield that has been 'sportered'. Serial number is 1,492,690 and full length barrel is stamped S.A. 11/35. I am returning it to a military configuration as a shooter (bore is excellent).

Regrettably, the rear-sight collar has been ground flat. How difficult is the collar to remove, once the cross-pin has been driven out?

Does anyone have a good source for this part (S.A. with lightening grooves)?

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