ARC Ring Height
How to Determine Ring Height
Stack pennies on top of scope mounting rail. Use the same number of pennies in each stack.
Set and hold scope on pennies. Adjust number of pennies until scope is at desired height with adequate clearance to barrel.
If you use scope caps, test fit with scope caps.
Count the number of pennies in one stack.
Find the intersection of the scope diameter and the number of pennies (Number in one stack). This is the recommended scope ring height.
The penny thickness used for this calculation is 1.5mm (0.059 inch).