Mark 4 tactical bases and rings are the strongest of all Leupold mounting systems. The one-piece base features a built-in 20 MOA slope for long range shooting. Both 6-48 shoulder screws and the larger 8-40 screws are included to accommodate high recoil applications. Strong 1/2" keeper nuts lock the rings solidly against the one or two-piece bases, or any Picatiny-style rail.
These rings are machined from solid steel, they offer superior integrity and tighter tolerances that are based on the proven cross-slot design.
Item Nr.: 301-59320
