Gas or Spring it makes no difference, You have a recoiling rifle and you need the rifle to recoil the same way each time to get accuracy, you can rest your hand on a beanbag for support then the rifle ontop of your hand - but the rifle itself should never rest on anything hard or a bipod as it ruins the accuracy.
Fitting a Bi-pod will mean all other positions you shoot will not be zero'd and useless for hunting. You would have to take every shot prone to get accuracy
But if your heart is set on a Bi-pod there are a number of barrel clamp ones you can get off Ebay,
Such as these thi