The Valmet 78 7.62mm x 39mm is an RPK style squad support weapon. This weapon is still in use by Finnish defense forces.
Stamped receivers and barrels between 16" and 20" in lengths with varying barrel weights. The main difference between Valmet's and other AK variants is the movement of the sights and stock configuration. The sight placement on AK's are with the rear sights on the distal end of the receiver and the front sight is on the barrel. The Valmet's places the rear sight on the proximal sight of the receiver cover and the front sight on the distal end of the gas tube. This gives a longer sight radius and aids in accuracy. The workmanship is good to very good. This rifle is chambered in 7.62x51mm, 5.56x45mm and 7.62x39mm.
Assault rifle model Rk 62 has been offered in 13 variants, with 7.62 × 39 mm, 5.56 × 45, and 7.62 × 51 cartridges and metal, folding and plastic stocks, Valmet M60, M62, M76, M82. The M82 is a bullpup design, with the action and magazine moved into the stock, and the trigger far forward on the barrel. This Kalashnikov variant was seen in two Arnold Schwarznegger films, Commando (1985) and Predator (1987).
Thanks to Hannu Salo for the pictures and information