should fit, not too sure but i think it should, however in terms of stocks i do know that ares guns can take real steel stock tubes and therefore take a real steel stock, in terms of rails im not too sure, my friend however does have a RIS on his but its a standard one where you can just remove the top and bottom with the delta ring just like if u had the heat shield on. i have a madbull DD MK18 RIS II on my King Arms M4 tho,
