The TANGO RM ACCU/LEVEL(TM) is Flatline Ops' newest and only picatinny rail mounted scope level, fitting all Mil Spec** rails. It boasts the industries only 'fine-adjustable' level feature after you install, for micro-adjustments. Ultra-low design fits under low-mounted scope tubes - without removing the scope*. A long-range shot has many factors to take into consideration to be sure you are on target, and our ACCU/LEVEL(TM) system aids in the correction of "cant error," giving you dead-on true vertical hold. The level also features an ultra-low profile and machine precision design to make sure you are locked into place before taking that critical shot. Mfg: Flatline Ops