i had an mia loaded from springfield a year or two back or so, ordered a bassett mount never could get it to stay tight following their directions. always shot itself loose. ended up using rockset and a inch pound torque wrench to lock it in. still never really liked how it all worked together and ended up selling it and buying a savage 10 fcp-sr.
the m1 garand and m1a really arent good vehicles for scope usage. the irons are superb but scopes, meh. i would say go with something that replaces the rear sight with a third point of contact along with the built in side mount screw. the only m1a's ive ever seen that seem to work ok are the ones with that setup.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...