Regarding the lack of recoil, that may actually be a 28 Gauge. Looking at the Browning 425 list here, plus how small diameter the barrels seem in relation to his hands, it appears to be that. Also note the 28 gauge has the least engraving with no embellishments that most of the other 425 models have.
IE, he was almost shooting a BB gun compared to a typical trap gun.
Even though the White Hut released the photo, I doubt it is what it says it is.