Has the Marine Corps or ARMY discontinued the use of the small M8 base plate for movement to contact/manual mode with the 60mm mortar?

I made a comment on a posting regarding my experience with 60mm in manual mode with the small base plate and someone blasted me saying that they only use one base plate now "old man".

I have been away for a minute, but the M8 is still listed in the TM's so what's the real story?

TIA