Rk 95 Tp The RK 95 TP ( known commercially as the M95 ) is a 7 . 62x39mm Finnish assault rifle adopted in relatively small numbers by the Finnish Defence Forces in the 1990s . History . The rifle was developed in the late 1980s in response to a requirement to replace the 7 . 62mm Rk 62 service rifle . Between 1988 and 1990 the SAKO company developed the M90 prototype , which was a substantially upgraded variant of the Rk 62 . Changes to the original design included the fire control and safety selector , whose lever was transferred to the left side of the receiver housing , the cocking handle cut - out in the bolt carrier assembly was covered with a strip of metal , the cocking handle itself was placed at an upward angle ( enhancing left - handed reloading ) , the rear sight assembly was installed on a sliding tangent with 150 , 300 and 400 m range adjustments and the rifle was equipped with a folding tubular stock with a latch modeled on the locking solution employed in the SIG SG 540 rifle . The M90 was also equipped with a multifunction muzzle device and manual gas valve , enabling the use of rifle grenade s . After undergoing further testing and implementing several changes ( among them , the selector mechanism was reverted to the familiar Rk 62 configuration ) the rifle was introduced into service with the Finnish Army as the 7 . 62 RK 95 TP ( Finnish : " Rynnäkkökivääri 95 Taittoperä " or " assault rifle 95 folding stock " ) . Design details . Operating mechanism . The RK 95 TP is a select - fire , gas - operated firearm using the Kalashnikov - pattern operating system with a long stroke gas piston rod coupled to the bolt carrier as in the AK rifle . The rotating bolt locks into battery via two locking lugs . Features . The weapon ' s spring extractor is installed inside the bolt head and enclosed in one of the locking lugs while the ejector is a fixed protrusion of the internal bolt carrier guide rail . The firearm uses a hammer - type firing mechanism and a trigger group that enables semi - automatic and fully automatic firing modes . The fire selector switch , which is also the manual safety toggle , can occupy one of three positions : the top " safe " setting ( the trigger and bolt carrier are both disabled mechanically ) , the middle setting ( marked with three dot symbols ) produces continuous fire and the bottom setting ( single dot ) activates a disconnector for single fire mode . The weapon ' s barrel has a multipurpose muzzle attachment , which performs the role of a muzzle brake , flash suppressor and a mounting base for launching rifle grenades . The gas block incorporates a manually adjustable gas regulator that isolates and disconnects the gas system in the closed position and a lug at its base — used to attach a blade bayonet ( i . e . KCB - type bayonet ) . The barrel can also mount a sound suppressor or blank - firing adaptor . The RK 95 TP has a plastic - coated tubular metal shoulder stock that folds to the right side and features an internal compartment used to store a cleaning rod . Both the forward handguard and pistol grip are made of a lightweight synthetic . For maintenance the weapon is field stripped into the following components : the receiver and barrel , bolt carrier , bolt , return mechanism , gas tube , receiver cover and magazine . Feeding . The RK 95 TP is chambered for the intermediate 7 . 62x39mm M43 cartridge . The rifle feeds from curved box magazines made of an impact - resistant polymer ( empty weight : 0 . 16 kg ) , with a 30 - round capacity of double - stacked cartridges . These magazines are also interchangeable with standard AK - 47 / AKM magazines . Sights . The rifle comes with adjustable iron sight s , consisting of a forward post and an L - shaped dual - aperture rear flip sight with settings for firing at ranges of 150 and 300 m . The front sight , corrected for windage and elevation , is mounted in a semi - shrouded post on top of the gas block , and the rear sight — on the receiver top cover . For operation in low - level lighting conditions the rifle uses subdued self - luminous tritium gas vials , installed in a separate folding post attached to the base of the front sight and deployed manually , and in the rear sight assembly in a fixed notch sight , exposed by rotating the rear sight arm 180° forward around its pivot axis . Additionally the rifle can be adapted to use various optical sights ( i . e . the Trijicon ACOG or night vision equipment such as the Patria VV 2000 passive night sight ) , through the use of a receiver - mounted side - rail . A detachable cheek riser is employed when using optics . Accessories . The rifle can be used with a barrel - mounted bipod or a 40 mm under - slung grenade launcher attachment . A railed gas block attachment was also developed for the weapon and is used to mount tactical accessories . Variants . A civilian 7 . 62mm - caliber semi - automatic version with a fixed buttstock was manufactured shortly as the M92S . An export variant of the rifle was also produced , modified to use the 5 . 56x45mm NATO cartridge with the SS109 bullet , fed from plastic 30 - round curved magazines . The barrel has four right - hand grooves with a rifling twist rate of 185 mm ( 1 : 7 in ) , and has a muzzle velocity of using standard ammunition . The rifle ' s rear sight is adjusted for firing at 150 and 300 m .