The AFF Universe Wiki also has an article on this topic: RID Infantry Weapon

The Falken RID is a single shot rail-gun that does high damage to enemy armored vehicles.

Like other anti-vehicle weapons, it's built-in scope provides a zoom level of x2.00 instead of the x1.50 zoom of most other infantry weapons.

While in Heavy AV mode, a lock-on must be acquired before charging or firing. In Light mode, locking on is no longer possible.