Looking at the video, it seems to have ambidextrous features for safety selector, magazine release, and bolt release. It's unclear how the new bolt release systems works as a bolt lock or not, but unlike a lot of AR, it is located right in front of the trigger guard.
Gas systems seems to be a short-stroke gas system.
Some parts are reusing K1 and K2 rifles parts, such as magazine release and selector lever.
South Korean HK416 clone by STV Motiv.— WeaponOutfitters.com (@WeaponOutfitter) October 14, 2019
SK SOF runs the HK416, but as everyone in the world knows, H&K Customer Service is famously German LMAO... hence the need for this SK domestic clone pic.twitter.com/W4GTJT0Cr0
Supposedly it uses 1:7 twist barrel in 12 to 16 inches
Instead of updating the K1/K2 like with K2C1 and K2C , it's a possible change from nearly 40 years of K1/K2 design. It's unknown what prompted this change, but it will be interesting how this develops from here.
From: Bemil and Weapon Outfitters