LEUPOLD STD 30MM MEDIUM EXT MATTE RINGER
Leupold STD 30mm Medium Ext Matte Ringer
will almost always use MEDIUM rings in a given style. In certain instances, 45mm scopes may require HIGH rings.
will almost always have enough clearance with LOW rings in a given style, though MEDIUM rings will give slightly more clearance, particularly when using a barrel with a thicker shank portion or a heavier contour.
will almost always use LOW rings in a given style. Again, in certain instances of a heavy barrel or heavy shank portion of a custom barrel, MEDIUM rings may have to be used, but LOW rings will almost always suffice.
VX-3L 56mm Riflescopes
will almost always use LOW rings, but in some instances, where there is a very pronounced barrel shank or relatively heavy barrel, they will use MEDIUM rings.