Range

The R-77's main advantage over the AIM-120 AMRAAM is in range and maneuverability. The longer range is because the R-77 is a larger 200 mm vs 178 mm (8 vs 7 in), heavier 175 vs 150 kg (386 vs 335 lb) missile than the AMRAAM and contains more propellant. Like most AAM weapons, the claimed range is for a non-maneuvering target, at a high altitude, and probably on a head on aspect with a respectable closing rate. Lower altitudes, rear aspect, or maneuvering targets will all reduce this range, but the same applies to the AMRAAM.

The planned upgrade of the AIM-120, the AIM-120D, is to have a much greater (+50%) range and thus no-escape zone which will exceed that of the standard R-77 by a large margin. It is unknown how the AIM-120D will compare to the R-77M design in terms of range.

Maneuverability

The missile's maneuverability relies on the lattice work fins at the rear. The R-77's aerodynamic configuration is claimed to provide superior maneuverability than the conventional deltas used on for example the AIM-120,^[3]. The weapon is reported to be able to handle a target maneuvering at up to 12g,^[4] a substantially higher rate than any manned fighter.