Silicone oil is great for lubing the slide on your gun.
however, a can of motormaster silicon spray lube works also
Its better for lubing a barrel because of its spray, but some express concern about it dammaging plastic, however, I drence my gun in it, a speay my mags till it drips, and I saturate my BB bags with it, and so far have had no problems with plastic dammage.
Open the valve on your mag and spray some in.