To elaborate on the ranges listed, 2,000-2,500 m is the effective range of the Javelin depending on the IR signature, meaning this is the reliable distance it can be used at doctrinally. The true max range of the missile is much farther, likely over 4km, but the current dismounted sighting package holds it back. (Hitting things or even seeing them out to 4km isn’t something to count on, although it can theoretically be done). CROWS-J’s sights could give it a lot more range than the current widescale CLU, but it isn’t really fully in service yet and has had delays due to issues with the software.