There are a variety of factors that affect scope ring height, such as rail height, objective lens size, and whether or not you are using it on a flat top setup. Here is an approximate guide for our Elite and Premier rings.
Open top setups using our Pictanny scope bases ( HNT26, LSS, LSS-XL, HS3, ESS no-rail and partial rail forends, ACC, and standard rifle stocks.)
Low (0.820) Up to 44 MM objective
Medium (1.00) Up to 50 MM objective
High (1.25) Up to 56 MM objective
Extra High (1.5) Generally not used in open top applications.
Fully enclosed/Flat top sets up (ESS with full rail forend and high scope base, TAC 21, and AR patterned firearms)
Low (0.820) Generally not used in closed top application.
Medium (1.00) Up to 44 MM objective
High (1.25) Up to 50 MM objective
Extra High (1.5) Up to 56 MM objective
I have a scope thats 6x24x50 should go with high or extra hi
For tac21 chassis
Extra high would be a safe bet.
Can I use medium ring with 56mm scope? Because I a use bolt action and I like to look lower scope not to high space.
With 56mm objectives, we do recommend the high-scope rings; however, we do offer a 30-day return policy for you to try the medium rings, and if they do not work, you can return them back for an exchange.