The 9M37 page is best read as the original missile component of the Strela-10 system. Public sources differ on some published weights because they mix bare missile, warhead, and containerized-round figures, but they consistently place the missile in the same short-range, low-altitude air-defense role.
Original round9M37 introduced the larger Strela-10 missile carried in launch containers on tracked 9K35 combat vehicles.
M-series update9M37M/MD sources describe improved seeker/autopilot behavior and, for MD, a heavier warhead path.
Later family member9M333 is a separate later missile for Strela-10M3-family combat vehicles.
Sources: Weaponsystems.net Strela-10; Missilery Strela-10M3; Rostec 9M333 State Defense Order.