Sako S20  The Sako S20 is a bolt-action rifle designed and manufactured by a Finnish firearms company Sako since 2020. The rifle features an aluminium chassis, which allows for modularity and different configurations, due to which Sako calls it a "hybrid rifle". Sako introduced the S20 rifle in 20 February 2020. At the date of its introduction, it is offered in two different main configurations, "Hunter" and "Precision". The S20 rifle features a steel receiver, which has Picatinny rails machined directly into it. The bottom of the receiver is milled to a V-shape for mating it to an aircraft-grade aluminium chassis for its whole length. The receiver and chassis are attached with three screws. The cylindrical bolt features three locking lugs and is manufactured from stainless steel, and its handle is replaceable. The bolt throw is 60 degrees. The barrel is cold hammer forged and is available in two different contours (grooved light and smooth semi-heavy) and lengths, 20″ and 24″. The muzzle thread is 5/8x24 (5/8-24 UNEF-3A). The stock, outside of the chassis, is made from high impact resistant polymer. Both the front and rear parts of the stock are interchangeable and allow the use as a takedown rifle; the hunter variant has a thumbhole stock, while the precision variant has a sporter stock. The stocks feature QD sling mounts, and the precision stock forend also features M-LOK accessory attachment points. The length of pull is adjustable with spacers and the stocks feature adjustable cheek risers with a visible dial number. The trigger pack is installed in an aluminium frame and has an adjustable pull between 1 kg and 2 kg, and the trigger position can be adjusted by 7 mm. Both single stage and two stage trigger packs are available. The safety blocks the firing pin when the safety is engaged. The magazines are detachable double stack single feed magazines, and they are available in two different capacity: 5 and 10 rounds for standard length cartridges (.243 Winchester, 6.5 Creedmoor and .308 Winchester) and 3 and 7 rounds for magnum cartridges (6.5 PRC, .270 Winchester, 7mm Remington Magnum, .30-06 Springfield and .300 Winchester Magnum). The magazines also allow for longer-than-standard overall length for the ammunition. The rifles can also be fitted with a wide array of accessories, including muzzle brakes, a thumb rest, barricade stop and such.