The RPG-26 Aglen is a disposable anti-tank rocket-propelled grenade (RPG) launcher developed by the Soviet Union. It fires a one-stage rocket with jack-knife fins, which unfold after launch. The rocket carries a 72.5-millimetre (2.85 in) diameter high-explosive anti-tank (HEAT) single shaped charge warhead able to penetrate 440 millimetres (17 in) of armour, 1 metre (3 ft 3 in) of reinforced concrete or 1.5 metres (4 ft 11 in) of brickwork. It has a maximum effective range of around 250 metres (820 ft). The similar sized rocket features a slightly heavier and more powerful HEAT warhead and more powerful rocket engine. The limited extension of the RPG-22 launch tube was found of little use. Thus, the RPG-26 has a rigid non-telescoping launch tube.

The RShG-2 (Russian: Реактивная Штурмовая Граната, Reaktivnaya Shturmovaya Granata, Rocket-propelled Assault Grenade) Aglen-2 (Аглень-2) is a RPG-26 variant with thermobaric warhead. RShG-2 is heavier than the RPG-26 at 3.5 kilograms (7.7 lb) and has a reduced direct fire range of 115 metres (377 ft). It is intended for use against infantry and structures rather than armoured vehicles.

The warhead contains 1.16 kilograms (2.6 lb) of thermobaric mixture, with an explosive yield roughly equal to that of 3 kilograms (6.6 lb) of trinitrotoluene (TNT). The solid rocket booster of the warhead was taken from the RPG-26 and the fuse taken from the TBG-7 warhead used by the RPG-7. The warhead has a stated penetration ability of 300 millimetres (12 in) of concrete and 500 millimetres (20 in) of brickwork.