The Sako S20 is a versatile rifle suitable for hunting and precision shooting. Its modular design enables customization of the stock to match individual preferences. The S20 Hunter variant is equipped with an ergonomic thumbhole stock, and the included spacers allow for easy adjustment of the length of pull. A numbered quick-adjust cheekpiece ensures optimal sight alignment.

Other notable features of the Sako S20 include a cold hammer forged barrel, a cartridge magazine, a full aluminum chassis, adjustable length of pull, a multi-adjustable trigger, and a comprehensive V-shaped aluminum bedding system.