Presumed by whom? I've always understood Conservatism to be explicitly Christian in its ideology, opposed to womens' rights, "non-traditional" sexual orientation and gender identity, abortion, multiculturalism, pornography, modern art, rock music, drug use and a litany of other things. The freedom to think and act outside of the box of "traditional American values and culture" has rather more often been championed by progressives and leftists.
Conservatives do support the individual freedom to own a gun, though. For individuals of a certain phenotype.