It is very frustrating that Leupold does not give ring height in MM or Inch. And their Ring selector program does not cover a Springfield M1A.
So if you have a Springfield M1A with ANY of the 22 inch barrels, and the Springfield 4th gen aluminum Scope mount adapter, a scope with a 35mm tube, and 56mm lens (my case a Mark 5HD™ 5-25x56mm), you want the Leupold Mk4 HIGH ring option.
--The HIGH rings raise the 56mm lens just enough so you can use the Iron sights WITH the 4th gen adapter still attached. So when you look thru the Springfield peep sight, to front sight post, you can barely see the bottom of the scope in your periphery. This means it does not impact your field of view.
-- BUT, you COULD use the MEDIUM rings. While they do raise the scope above the front sight, the bottom of the scope will moderately obstruct your ability to see the PERIPHERY above it. Think the equivalent of aiming at something very close but your scope is at max magnification, or an extremely small sight aperture on a moving target.
--As for the SUPER HIGH rings, you could use them. They definitely raise the scope clear of the Iron Sight field of view. But extra height is never desirable. For new shooters, think about mounting a scope 12 inches above your barrel. If you sight it in at 25ft, your barrel needs to be tilted up to meet the reticle. So when you aim for something at 50ft, your bullet would pass WELL above, over the target.
--Another note on scope height. Your scope is always exposed, higher rings equals more exposure. No matter how careful you are, you will bump it into something.
**One final note specifically for the 4th gen aluminum scope mount adapter, it is designed so you can use the iron sights while it is still attached! BUT Springfield has no mention of this fact!!
So if you have a Springfield M1A with ANY of the 22 inch barrels, and the Springfield 4th gen aluminum Scope mount adapter, a scope with a 35mm tube, and 56mm lens (my case a Mark 5HD™ 5-25x56mm), you want the Leupold Mk4 HIGH ring option.
--The HIGH rings raise the 56mm lens just enough so you can use the Iron sights WITH the 4th gen adapter still attached. So when you look thru the Springfield peep sight, to front sight post, you can barely see the bottom of the scope in your periphery. This means it does not impact your field of view.
-- BUT, you COULD use the MEDIUM rings. While they do raise the scope above the front sight, the bottom of the scope will moderately obstruct your ability to see the PERIPHERY above it. Think the equivalent of aiming at something very close but your scope is at max magnification, or an extremely small sight aperture on a moving target.
--As for the SUPER HIGH rings, you could use them. They definitely raise the scope clear of the Iron Sight field of view. But extra height is never desirable. For new shooters, think about mounting a scope 12 inches above your barrel. If you sight it in at 25ft, your barrel needs to be tilted up to meet the reticle. So when you aim for something at 50ft, your bullet would pass WELL above, over the target.
--Another note on scope height. Your scope is always exposed, higher rings equals more exposure. No matter how careful you are, you will bump it into something.
**One final note specifically for the 4th gen aluminum scope mount adapter, it is designed so you can use the iron sights while it is still attached! BUT Springfield has no mention of this fact!!
