Solid mounts that you can't see through/under and a Leupold 2-7x33 with a heavy duplex reticle, like the VX-1 shotgun style, is my preferred Marlin 336 sights. I have Weaver #62B one-piece bases, Warne Maxima rings, and Leupold 2-7x33s on my Marlin 336s in 30-30, 307, 35, and 356.

If you like Marlin 336s, you might enjoyed reading some of the articles that Marshall Stanton has written on his www.beartoothbullets.com site. Two that I like are in the "tech notes" section; "Marlin Trapper Carbine" and "Savage 24".