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 shoot-it'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).