Sure are some interesting combos here.

I just received this garden variety Merkel 90, scoped with a 3.5-10 Leupold VX3i in a swing mount. It's 12/12/7X65R and can manage 3 shots in 1" at 100 yards with the barrels cooled down well between shots. These models have my favorite safety and selector setup.

It's a bit heavy. All I need now for it is a restored Panzer with a machine gun turret to mount it on. My Kreighoff Trumpf Dural in 16/16/7X65R with a Zeiss 1.5-6 in their LW three-claw mounts weighs 2.5 pounds less, relegating the Merkel to truck-gun status.