You called it M. Wilson.
It was a T-15 Torx.
I bought a small Craftsman socket wrench set at Ace to hold me over until I can get a better more gun oriented set.
So the Aimpoint mounting plate is mounted and the Loctite is taking a set. I will try Vibratite on the next mounting, but I am attempting to get the ACRO mounted and zeroed before TACON so I can take Scott Jedlinski’s 4-hour Pistol Red Dot course.