At the request of the Schmidt and Bender PRS team captain, Griffin designed a housing to support a ceramic ball level accessory for the SPRM™² scope.
Constructed of aircraft grade aluminum with custom glass levels, the Griffin ceramic ball level achieves the same precise resolution of less than 1° with line increments of 2.5°. This allows a shooter to more consistently eliminate rifle cant, which can cause windage point of impact error especially at long ranges such as 800 meters when dope on the rifle may require ~25.5 foot hold overs. At 25.5 feet of aiming elevation, a mere 1.5 degrees of cant from level creates 8 inches, or nearly 1MOA at 800 meters of windage error on target. While optically squaring the horizon is functional most of the time, optical illusions from uneven grade can be eliminated with the use of an anti-cant level of this type.
PRS shooters talk about how air bubble levels more common to the market move too rapidly, bubbles change shape, and offer poor contrast, taking long enough to render the systems functionally useless. Ours use a ceramic ball and curved tube for greater resolution and contrast.
The Griffin ball level accessory is compatible with the Accuracy 1st Anti-Cant scope level light (available through Accuracy 1st), which affords the ability to see the ball level in low light conditions or total darkness.
This accessory must be mounted on the left upper 45 degree surface of the SPRM™² mount ring, and is not ambidextrous, but rather is intended for majority right handed shooters.
Screws are included for installation.