Christians : question about islam and judaism 4m christian view ?

1- muslims believe in the same god of abraham 2- jews have a chance to go to heaven acc. To the old covenant by deeds . . . So since muslims are true devout worshipers of god pray fast dnt drink or date watch god in almost all their acts and they r strict to their law (very similar to the mosaic law) do they go to heaven to ? Acc. To the old covenant ?