Simon, most Marines will never see one of those 1911 handguns.
It is being purchased in relatively small numbers to replace worn-out 1911s that the MARSOC units have never stopped using. Regular Marines, will still use the M9 (or M9A1) from Beretta.
Who hesitates to call any Marine "regular", for obvious reasons!
“There’s a rattle in my glove box,
A Federal twelve-gauge slug.” – Adam Carroll in song Porter Wagoner