In 1989 Sako Ltd. (Riihimäki, Finland) introduced the TRG-21 precision rifle as a sniper rifle model chambered in .308 Winchester. With the introduction of the TRG bolt-action, Sako moved away from the modified two-lug Mauser bolt-actions, favoured during the past, to an action with a symmetrical three-lug bolt of diameter, displaying a locking surface of . The TRG-21 action was designed for a maximum cartridge length of . The evolution of this design continues to the present and can be found in Sako's hunting rifle offerings, the Sako 75 and the Sako 85. Subsequently, a second precision/sniper rifle with a longer scaled up magnum action emerged as the TRG-41 in order to take advantage of the .338 Lapua Magnum cartridge.