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.

[4] In late 2018, the S&T Motiv "Next-Generation LMG" was standardized as the K15, a heavily upgraded version of the K3 planned for fielding to the ROK Army by 2020.

It has an adjustable buttstock and redesigned pistol grip/trigger group component for improved ergonomics, and internal parts are reconfigured and manufactured with closer tolerances for better reliability.

The feed cover and handguard have rails integrally attached, rather than needing an adapter to have them installed like the K3; this helps it to utilize a day/night fire control system that uses a thermal sight, laser rangefinder and ballistic computer.

[7] A controversy broke out 2007 in the Philippines when the country's Armed Forces initially selected the FN Minimi rather than picking the K3 or the 5.56 mm Ultimax from Singapore.

The AFP's Modernization Program was attacked for showing favoritism towards a Western firearms company over Asian arms manufacturers.