No , it's the later Isreal version that has the bipod fitting on the bbl jacket . The US A6 had a shorter jacket with a longer bearing assmly . The bipod head slipped onto the bearing assmly and was held by a snapring. Because of the lighter bbl on the A6 , they did not have a booster at first and the bbl had a nut and stuck out beyond the bearing assmly for quick changes ( over the A4 ) . Lack of power in the field lead to a longer bearing assmly and a booster being added , held on by a springy horseshoe clip ( which later had a hinged retainer added ) . The stock slipped over the tube above the pistol grip and a clamp swings down in front of the grip and holds it in place . When they came out with flash hiders , the A4 screwed onto the jacket replacing the bearing/booster combo . The A6s just replaced the slip on booster and is held on by the same clip.
It does look like there is a flat spot for the bipod in the photo plus you can see bits of white hair in the jacket holes here and there , indicating the thinner A6 bbl.
Chris