Be prepared - Aero Precision Ultralight 30mm Scope Mount, Extended

It is indeed amazingly light and a beautiful chunk of aluminum. Being left handed and the fact that the dust cover on left eject uppers opens upwards instead of down really limits optic mounting options. This one right here is the thinnest, least interference you can possibly get. Looks fantastic too. But as the title says, be prepared. It does twist the scope to the right every time you torque the rings. It is a mind numbing task to guess how much offset to the left you need to end up level at torque. There's gonna be a lot of too little too much until finally lucky perfection. If you want a great looking ultralight mount that the scope will stay in for a long time it's definitely worth the effort. If you plan to change scopes a lot using the same mount I'd stick with top fastened ring mounts for ease of leveling.