Just picked up a 3" browning gold and I'm going to have the receiver drilled and tapped. What mount would best fit the top of the receiver snug? I'm looking at the marlin 336 or the sumtoy mount. Whichever I'll be running I'll have it drilled and tapped per mount. Only thing I'm more concerned about is how the mount will sit snug on top of the receiver. I'll be running a holosun 508T.