[natedog]

What the sig line says.

[Telperion]

From Lee Emerson's M14 Rifle History and Development:

The following parts are interchangeable between the M1 Garand and the M14 type rifle: butt swivel, lower butt plate screw, rear sight aperture, elevation knob and pinion (note that the M14 elevation knob is calibrated in meters, while the M1 Garand elevation knob is calibrated in yards), rear sight base, sight cover, trigger (although the sear requires slight modification of the M14 sear for use in the M1 Garand rifle), hammer, hammer spring, hammer spring plunger, hammer spring housing, safety, hammer pin, trigger pin, extractor, extractor spring, extractor spring plunger, hand guard clip (as long as it has not been deformed during removal from the M14 rifle hand guard or the M1 Garand rifle rear hand guard), and butt plates on certain M14 stocks.