The design of the PG-2 differed considerably from that of the PG-1 of the RPG-1. The rear section of the PG-1 consisted of a central tube holding the propelling charge, and a second tube around this carrying the fins. When the round was inserted into the launcher, the second tube was outside the launcher tube, requiring the front of the launcher to be free of any fittings. The PG-2 replaced the fins with small metal leaves attached to the inner tube, and eliminated the outer tube found on the PG-1. This allowed the entire propellant section to be inserted into the launcher, which in turn allowed the sights and trigger assembly to be mounted right at the front of the launcher. This slightly reduced the length compared to the RPG-1, made the entire assembly more robust, and allowed the use of conventional fore-and-aft sights.