The G33STS from EOTech is a Gen III Magnifier with a Switch to Side (STS) mount, tool-free azimuth adjustment and an adjustable diopter for precise focusing. G33 is an improved mount for faster 3x to 1x transitioning and a larger field of view. It is fogproof, temperature rated for -40 to +160 degrees F and waterproof to 10 meters. The Quick STS mount twists the magnifier out of the way for shorter range shots, locking in that position until pushed back into place for magnified viewing. The G33 also offers a locking, quick detach lever for the optic and the mount. It aligns with standard-height sights and comes with a 7mm riser to accommodate raised sights. EOTECH STS Magnifier Mount is compatible with G30, G33, G43 and G45 Magnifiers.