BSA, yes that is my understanding. I haven't tried it as my eyes have made using irons hopeless, I'm praying that cataract surgery will fix that, if it does I'll give it a try.
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Sorry to hear about your eyes. My left eye is like that, damn near worthless with irons, especially with a diopter sight. Good luck with your surgery!! I have been having a great time shooting right handed with my irons lately.. Its like re-learning to shoot again though..
