The RMR Type 2 is designed with a patented housing shape that absorbs impacts and diverts stresses away from the lens to increase durability. It also offers redesigned and upgraded electronics that have been proven to perform when mounted on slide ride pistols and other small arms. Its suitable for military law enforcement concealed carry self-defense target shooting and hunting applications. The battery powered LED RMR Type 2 features a sensor which automatically adjusts the brightness of the illuminated red dot based on ambient lighting conditions. The 3.25 MOA dot in the RM01 is the most versatile and popular of all RMR dot sizes. The dot is small enough to allow accurate shooting at range while also being big enough locate quickly. The RMR Type 2 has identical physical dimensions and mounting footprint to that of the original RMR Type 1. If selecting an RMR for mounting on the Glock MOS Springfield OSP Walther PDP or H&K VP9 Optics Ready a Trijicon RMR mounting kit (AC32064) is required. *Does not include mount.