EOTech EXPS2

The EOTech EXPS2 is the daylight-only member of the EXPS family. It shares the EXPS3's housing, 3.8 x 2.3 x 2.9 inch dimensions, 11.2 ounce weight, side-mounted brightness buttons, and integral quick-detach lever, and it runs the same 68 MOA ring with a 1 MOA center dot on the -0 reticle. The raised EXPS base puts standard iron sights in the lower third of the window, and the side buttons stay reachable with a G33 or other flip-to-side magnifier mounted directly behind the sight.

Two specs separate it from the EXPS3. The EXPS2 has 20 daylight brightness settings and no night vision settings, where the EXPS3 adds 10 settings for Gen I through III+ night vision devices. EOTech also rates the EXPS2 water resistant to 10 feet, against 33 feet for the EXPS3. Power is a single transverse CR123 battery rated for 1,000 continuous hours at setting 12 at room temperature, and the operating range is -40°F to 140°F. Adjustments are 0.5 MOA per click, and the sight is made in the USA.

Against the XPS2, which shares the 3.8 inch length but sits lower and narrower at 2.1 x 2.5 inches with rear buttons and a cross-bolt mount, the EXPS2 adds 2.2 ounces in exchange for the side buttons, the QD lever, and the lower 1/3 co-witness height. In November 2015, EOTech and its then-parent L-3 paid $25.6 million to settle a False Claims Act lawsuit; EOTech admitted it knew of thermal drift and cold-weather parallax problems and kept selling the sights to the military without disclosing them.