sentences:  S&T Motiv is attempting to win the contract by modernizing the K3 with a side-folding adjustable stock, an integral MIL-STD-1913 rail on feed cover, detachable side and underside rails, a carbon fiber heat shield over barrel, an improved muzzle brake/flash hider, folding iron sights, and an upgraded feed system.The same improvements would also be applied to the shorter "Para" version.As of 2019, it has not been adopted for general service, but it was has been suggested that special forces units could use it.