An ideal combination of durability and value. Straightforward two-screw design simplifies installation and requires less front-to-back space, for applications where installation choices are limited. The positive locking jaw design and machined recoil lug provide perfect alignment for superior accuracy when mounted to Mil. Std. 1913 bases. Offered in four heights for 30mm diameter tubes. An excellent mounting solution when partnered with a Standard Duty or X-Treme Duty™ base.