Mount fits right hand firearms.
Base screws are 6-48 X 1/4″ long. Ring screws are 6-40 X 5/8′ long. Both use a 7/64″ Allen wrench.
Long action – Outside to outside of rings is 4.61″. Standard rings are .63″ wide and have 2 ring screws per ring. Tactical rings are .80″ wide and have 4 ring screws per ring. Hole to hole spacing dimensions are .86″, 4.48″, .60″. Height of mounts from top of receiver to centerline of scope tube is – low .98″, medium 1.11″, and high 1.23″.