That's all I'm missing for my .300 RUM. The rings that are on it, are just some I used to have on a .22-250. I'm not sure what height they are, or what height to go with. I have a 3.5-10x44 Zeiss on it. I'm looking at the Burris Xtreme Tactical rings, they have 6 screws per ring, which seems to me like it would hold well. Open to suggestions.