Trijicon added MRAD reticle choices to the 4×32 and 3.5×35 ACOG models. The markings stay independent of any single cartridge or factory trajectory so shooters can compute their own elevation and wind holds for mixed rifles, calibers and loads, including shifts between supersonic and subsonic ammunition. The designs grew from the company’s Voice of Customer process after field users asked for that flexibility. The ACOG continues as the official medium-distance optic of the Marine Corps and U.S. Special Operations Forces, with more than one million units produced. Weeks earlier the same process produced caliber-specific BDC reticles for the ACOG Compact line, one for .223 out to 700 yards and one for 9mm PCC out to 300 yards.