a number of rimfire rifles, among them are the P72 Finnscout, M78, Finnfire, Quad and Finnfire II. The M78 was also chambered for the .22 Hornet and the .22 WMR in addition to the .22 Long Rifle. During the 1980s (1987), Sako started using the AI/AII/AV designations (previously used for models imported to the US) for the three action lengths in Europe. The complete rifles were still designated L461/L579/L61. The bolt was given a slight cosmetic makeover, with the hammer covered by a conical shell. This visual design was also used on the later models (M4/5/691, M75, M85). The L579 could be delivered with detachable magazine although the default was a hinged floorplate. From 1987 to 1992 a version of the short (Vixen) action was produced for the .22 PPC and 6mm PPC cartridges, when Sako introduced these former wildcat cartridges as commercial cartridges, denoted ".22 PPC USA" and "6mm PPC USA" to avoid confusion with the specialized bench rest cartridges which required a "tight neck" chamber. These actions are the same external dimensions, and have the same bolt diameter as the 222 Remington, 222 Rem. Magnum, 223 Rem. cartridge actions. Only the bolt face recess was enlarged to suit the PPC case. In 1992, the first of the "newer" Sakos, the 591, was introduced as a replacement for the L579. Shortly after, the 491 and the 691 were launched. These rifles (491/591/691) are not as highly regarded as the L461/L579/L61R and according to folklore, the quality of the workmanship is slightly inferior for the 491/591/691. They featured a separate recoil lug, also found on the 75, and a Tikka trigger assembly. However, these rifles were available in left-hand configuration both as a medium action (591) and long action (691) In 1997, Sako launched the 75, named for Sako's 75th anniversary. The 75 was externally similar to previous Sako models, but the construction was radically different featuring three symmetrical locking lugs and a detachable magazine. Before the 75, Sako hunting rifles (except the L46 and the L579) did not have detachable magazines, but a hinged floorplate with the lock placed on the front of the trigger guard. Sako's latest (and current) model, the M85, was introduced in 2006. In 2020, S20 was released. Current production Sako brand Sako S20 — A modular "hybrid" rifle with aluminium bedding chassis and interchangeable furnitures (buttstock/grip and fore-end) Sako 85 — Sako's premium-line bolt-action