So it seems that the RPG-32 is considered to be successful, and they will likely come up with a new grip and sighting system, to which the various types of rocket tubes can be attached and used.
To give you an indication of the range of rockets we are talking about there was the RPO series, which included three different types of rockets... namely a smoke rocket that could fill a small room almost instantly with thick acrid smoke, an incendiary rocket that spread burning material over quite a wide area and of course the primary thermobaric rocket, called Fuel Air Explosive in the west that explodes like HE, but not as fast, but rather more powerfully and hotter than standard HE. There was also the MRO which at just under 5kgs per rocket launcher and rocket was under half the weight of the RPO rockets which were 12kgs including launcher, which means we are already up to 6 different rockets. These rockets have been largely replaced by the RPO PDM-A/Z/D which are, like the MRO, smaller and lighter but have the warhead power of the RPO and much longer effective range than the RPO.
RPO-A, RPO-D, RPO-Z, MRO-A, MRO-D, MRO-Z, RPO PDM-A, RPO PDM-D, and RPO PDM-Z are all used by engineer troops as standard, but other forces use them too.
For anti armour use you also have the RPG-18, RPG-22, RPG-26, RPG-27, RPG-28, and the RPG-31.
Each of these rockets has either a single or tandem HEAT warhead and is designed to penetrate armour.
The RPG-26 is a 72.5mm calibre rocket with a single warhead, with a weight of 3kgs and can penetrate about half a metre of steel armour, which means it is useful against bunkers and light vehicles or tanks from the rear.
The RPG-27 is a 105mm calibre tandem warhead rocket with a weight of just over 8kgs and could probably penetrate most tanks from the side with "over 600mm" penetration figures.
The RPG-28 is a 125mm calibre rocket with a tandem warhead and it weighs 12kgs and would be dangerous to tanks from any angle.
The RPG-7 and RPG-29 are reusable launchers that use both HEAT warheads and thermobaric warheads. The disposable launchers above have the HEAT rockets of the RPG-7 and RPG-29, while the rockets with the thermobaric warheads are the RShG-1 (with the 105mm calibre HE warhead of the TBG-7V round fired by the RPG-7 and the TBG-29V fired by the RPG-29 which are both also 105mm calibre thermobaric warheads).
The RShG-2 is a lighter 4kg weapon with a 72.5mm calibre rocket for use against light vehicles or small bunkers or reinforced positions like a machine gun nest or sniper position.
There is also the RMG which is a tandem warhead weapon where the first warhead blows a hole in something and the second blows fuel into the vehicle or building/shelter and detonates it.
So I count 18 disposable launchers, plus the RPG-2, RPG-7, RPG-16, RPG-29, and RPG-32 reusable launchers.
RPG-2 and RPG-16 are obsolete.
RPG-7 has an external warhead so larger calibre rockets are easy to develop so it has staying power in terms of up grades, but the limits of the 40mm calibre rocket motor means its trajectory is getting very curved for the rockets with the big warheads.
The RPG-29 is effective, but big and it has a fixed calibre of 105mm.
RPG-32 has the advantage of replacing a range of weapons by having HEAT and HE warheads in 72.5 and 105mm calibre.
I think a more sophisticated version of the RPG-32 is the way forward.
A grip and sighting system that has a laser range finder and ballistic computer as fitted to modern sniper scopes together with clip on launch cannisters that can be a range of calibres depending on the users needs, from 72.5mm with light rockets for a range of light targets, through 105mm and 125mm and perhaps even larger for more and more difficult targets.
The ammo can come in sealed tubes, and when attached to the grip/sight the attachment should connect to the sight so the ballistic computer knows what type of ammo is fitted. The user can then punch in the temperature, lase the target and fire and have a reasonably good chance of a hit.
The advantage of such a design is that the rocket motor can become wider and heavier as the warhead calibre increases, which means much better range performance than with RPG-7 rounds limited to 40mm diameter rocket motors.
To give an indication of the performance increases the old RPO was a 93mm calibre 12kg rocket with an effective range of 600m and a max range of 1,000m. The RPO PDM-A is a 90mm calibre rocket that weighs 8.8kgs and can be used against point targets to 800m or area targets to 1,700m.