Any scope that can go on a .22 rim fire will be safe for a gas ram! It is only a small kick straight back at you after all! I have never found the recoil on gas rams to be that bad, now had a Hatsan 60S TG GR, Theoben Sirocco (low pressure) and now got a Theoben Fenman HE!

Never had a problem with mounts coming lose or scopes dying on them!