The new HG M3/D3 Gen. 2 is the next generation in our line of M3/D3 optics.  Utilizing the same solid construction and mounting system, the new sight continues to use the thumb screw allow it it to fit both weaver and picatinny rails.  
 
Features: - NEW true 2 moa dot available in    both models - Up to 5000 hours of battery life - Water resistant - Product weight: 6.2 oz - Product dimensions (HxWxL): 2.25 x 2.5 x 3.2