The Trijicon Specialized Reflex Optic (SRO3) 5.0 MOA Adjustable LED red dot is best for applications in which speed and recovery of the dot is critical such as in competitive shooting. The wide field of view and clean, crisp dot makes it easy for users to find and track the dot in both target and competitive shooting applications, helping improve shooting accuracy and speed. Every SRO features both manual and automatic LED brightness modes and a 3-year battery life. The SRO is designed to survive the rigors of slide ride pistols and is engineered for hard use. It has been tested to survive up to 30,000 rounds of .45 ACP recoil.The SRO is forged from 7075, T-6 aircraft grade aluminum, making it much more durable than conventional red dot sights. This forged housing protects the lenses and electronics, and it has been tested to survive typical pistol mounted drops. Includes 1 Trijicon Logo Sticker (PR15), lenscloth, 2- #6-32 Flat Head Torx Cap Screws 1/2" long, Torx Head Key, Manual and warranty card. *Note- If selecting an SRO for mounting on the Glock MOS system or the new Springfield OSP pistol, a Trijicon Mounting kit (AC32085) is required.