Found an old video of
with some pretty good close-up shots ( it's from 2017... I don't know if it's been posted before or not). The instructor said it's using a combined short-recoil and gas operated mechanism (I'm pretty sure most of us already know this). When firing, the barrel recoils back 13mm to lower peak recoil. The video didn't say if it's gas-piston operated/ direct impingement, but from the gas tube, direct impingement seems more likely. It's aimed with a combination scope that has 2 lenses (the lower one for ground target, the upper one for air target) and single eye relief.
The operators are 5 men (1 gunner, 4 ammo carrier), supplied with ~300 rounds. The gun weighs 26,5 kg (probably gun+tripod, no ammo). The ammo is ~126 grams apiece, 50 in a box, color-coded at the tip (black is AP, green is tracer, red is incendiary. Multiple color bands indicate multifunction round, i.e. black+red bands = AP incendiary, black+green = AP tracer.)
Note: The video has obnoxious ads, but the content seems pretty good.
