CZ 457 Varmint 20" in a Krg Bravo back bone with a W3 folder and enclosed forend.
Area 419 30 MOA rail for a Spuhr with additionally 20 MOA cant for a total of 50 MOA which is a tad less than half of the total adjustability of the IOR Recon 4-28×.
Old random bolt knob rubber ball, a Atlas PRS...