Should be short stroke... the weapon it seems to be based on (416) is a short stroke... also nowadays pretty much all Chinese gas operated rifles are short strokes (type 81, 95, 03, 191 etc)...That is a thick/heavy barrel on that one, hopefully it's cold hammer forged.
Pretty apparent as a HK-416 copy, with a gas regulator up front.
Does it use a long stroke (AKM) or short stroke piston (FAL, 416)?
It seems that the 338 model they're using has been modified. The stock is of a different design and the area around the magazine well seems to have been redesigned as well. (And ofc the muzzle brake, but thats obvious)
That sight is way too high above the barrel. It is An additional 2-3" above iron sights which is already fairly high up.