Reticles
One of the unique capabilities of the AN/PVS-4 that is not available in many other night vision weaponsights is the field-changeable reticles.
By replacing the reticle, the AN/PVS-4 is able to provide service to a wider variety of weapons than any other weaponsight including Squad Automatic Weapons, rocket launchers, grenade launchers, Shoulder-launched Multipurpose Assault Weapons and recoilless rifles.
Read more about this topic: AN/PVS-4