8-40 adaptable (Mark 4)-Mark 4 tactical bases are the only bases to accommodate both the oversized 8-40 screw and a 6-48 screw, providing compatibility with the widest range of modern tactical firearms
Dual Dovetail bases accept all Leupold rotary dovetail rings
All Leupold optics offer performance that makes them equally at home in hunting or tactical environments, thanks to their outstanding accuracy, legendary ruggedness, and absolute waterproof integrity
Leupold's trademarked Dual Dovetail system provides a classic low-profile mount for scopes on a variety of popular actions

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WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).