FIND IT HERE! https://doublemdefense.com/product/vx-sport-30mm-mount-2-1-59/ 

Vortex cantilever ring mounts provide the correct height and forward placement for proper scope mounting on flattop ARs. Available for 30mm tubes in 2 inch or 3 inch offset.

TORQUE SPECS
Base Clamp Screws 20 in/lbs
Ring Screws 18 in/lbs