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. It’s 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 quicklyNOTE: 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 system or Springfield OSP pistol, a Trijicon RMR mounting kit (AC32064) is required. INCLUDESRM33 Low Picatinny Rail MountCR2032 Battery2 RMR ScrewsHex WrenchRMR ManualTrijicon Sticker (PR15)Warranty Card Trijicon 3.25 Red RMR Type 2 - RM33 RM01-C-700601