Key Point: Newer designs are quicker and easier to launch.
The Carl Gustav and the AT4 are some of the most popular anti-tank systems in the world. While the “dumb” rockets both launchers fire may seem outdated in a world full of anti-tank guided missiles, often times the additional weight and complexity a guided missile brings is unnecessary for a task.
This has been proven by the effective use of the Soviet RPG-7 series of launchers by various adversaries through the years. While some companies in the West now made a modernized clone of this launcher, the de-facto standard weapon of the same class for NATO for many years was the Carl Gustav recoilless rifle.
While significantly heavier than the RPG-7, the Carl Gustav is largely considered to be more accurate and easier to shoot, since the projectile doesn’t move in the reverse direction of the wind (as finned projectiles, including those shot by the RPG-7, will do).
Both launchers have received updates for the modern era. The standard telescopic sight provided with the Carl Gustav has seen updates to its reticle between the M2, M3, and now M4. The Gustav M4 is also offered with an automatic laser rangefinding sight with a ballistic computer for even more precise shots.
Likewise, the RPG-7 has had the drop compensator of its PGO-7V telescopic sight changed to account for newer ammunition types (such as the PG-7VR tandem warhead round).
But while updates to the telescopic reticle are common, the Carl Gustav M4 is notable for totally doing away with iron sights as the backup sighting system, eschewing them in favor of a small “micro” red dot sight.