Get on target fast with the SPARC II Red Dot Sight by Vortex! This ultra-compact and lightweight red dot sight is equally at home on an AR-15 or other modern sporting rifle, but is highly compatible for use on shotguns as well. It features digital rear facing controls for powering on/off, and switching between the 2 MOA daylight bright reticle's 10 illumination levels. Other features include a rugged construction of precision machined aircraft grade aluminum, and o-ring seals for 100% waterproof and fog-proof performance.