Complex sentence: Long guns are more often stolen opportunistically in home burglaries, but few homes have handguns and a substantial proportion of stolen handguns are taken from security firms and other businesses; only a tiny proportion, 0.06% of licensed firearms, are stolen in a given year.
Split into simpler sentences: Long guns are more often stolen opportunistically in home burglaries, but few homes have handguns and a substantial proportion of stolen handguns are taken from security firms and other businesses. Only a tiny proportion, 0.06% of licensed firearms, are stolen in a given year.