Ready to handle any environment, the SPARC AR features bomb proof like construction with a compact and lightweight form factor. The 2 MOA dot is as easy as point and shootit's quick to acquire in close quarters scenarios, but fine enough to promote pin point accuracy at extended ranges. A unique, integrated base is hassle free for any AR or similar platform. For excellent, reliable performance and loads of user friendly features, look no further than the SPARC AR. Includes a spacer shim that can be utilized to provide two different mounting heights: lower 1/3 co witness (40 mm) & absolute co witness (37 mm).Battery Life: Up to 300 hours on highest setting. Up to 5,000 hours on lowest setting. The VMX 3T Magnifier is not recommended for use with the SPARC AR.