I have a DNZ one piece on both my Tikka Hunter in 30-06 and my Winchester Mod. 70 in .223. I love them. Easy to install, solid as a rock, and light. You can't go wrong, in my humble estimation. However, I can't say about the med. for a 50mm scope, as mine are both 40mm on low rings. The company will advise or call the distributor - they should know if it's a go or not. Good Luck.