This item is a rail offset adapter for the Trijicon RMR (Ruggedized Miniature Reflex).
Developed to improve precision and accuracy with any style or caliber of weapon, the Trijicon RMR™ (Ruggedized Miniature Reflex) is designed to be as durable as the legendary ACOG. The RM01 is an LED sight powered by a standard CR2032 battery. Housed in rugged forged aluminum, the RMR is extremely tough yet lightweight. New easy-to-use adjusters with audible clicks allow for quick windage and elevation adjustments. The new Trijicon RMR™ is tougher than any alternative and suitable for military, law enforcement and hunting applications.