Designed exclusively for the Trijicon Tri-Power. The unique ring saddle allows for optimum surface contact for the most secure fit. Ultra rugged and low mounting that can also be modularly raised via optional spacer platforms. The spacers can be added at a modest cost. Secured to an ARMS #17 Platform with the ARMS patented Throw Lever system guarantees easy on and off repeat zero. Built in no-mar patented buffer pad. 22TX30 Spacers also available for added height.