Spade I use low rings for my 42mm scopes but I use Burris or SS tacticals.I think I have one in the signature lows and it fits ok, these are all on two piece bases. Eye relief can be a little tough but usually with a little patience you can get it done, some bases need a little filing.
When you have trouble finding a base look at the EGW picatinny rails, there is plenty of adj. with them.
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