Mount is as low as you can, you might be able to get by with the low rings but i have a feeling medium is what you might end up with. it has more to do with clearance of the scope near the rear sights when you mount it. probably best to take it to a gun shop and get their opinion on it. the reason i say keep it low is because the higher you go, the more you are going to have to raise your cheek off the stock to see through the scope. i purchased a cheek rest from cabelas for my stock, that solved the problem.