Description
At the request of the Schmidt and Bender PRS team captain, Griffin designed a housing to support a ceramic ball level accessory for the GPM™ scope mount.
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 GPM™ mount ring, and is not ambidextrous, but rather is intended for majority right handed shooters.
Screws are included for installation.
John Williams –
Very robust way to mount a precise level. Just as I had hoped for.
Phil –
At first was shipped without screws, once they cleared that up and I got it mounted, it is a tank! Perfect for the tough PRS barricade shooting I do. Thank you!
John D –
These levels are great, and the fact they attach to the mount is a huge plus. The only issue I have is if you mount in front of your turrets it doesn’t leave much space for manipulating the parallax and if you mount it in the back, depending on the scope, you can catch it when using a throw lever.
Mike –
Works well with the GPM mount, and I can mount it to the front of the parallax knob, where it’s easier fir me to focus on