Model: XASR-3040
30mm Diameter, Adjustable Elevation Height From 32 to 38mm (1.25-1.5'' Bottom to Ring Center)6 Torx Screws Per Ring, Can Fit 56mm Objective Lens Scope, CNC Well Machined, 1913 Picatinny
Model: XASR-3045
30mm Diameter, Adjustable Elevation Height From 35 to 41mm (1.4-1.6'' Bottom to Ring Center)6 Torx Screws Per Ring, Can Fit 56mm Objective Lens Scope, CNC Well Machined, Dovetail