Abortions rights were created via Roe v. Wade by the U.S. Supreme Court, the same court that has affirmed gun rights that, unlike abortions, are specifically enumerated by the 2nd Amendment. Drawing parallels to abortion "killing" works for the pure political dynamic that is in play, at least for court rulings. The baby killing abortion rights lobbies refuse to compromise to a "happy medium".
I don't know of any group, including the NRA that is claiming unlimited, automatic, military spec gun rights. Long guns and rifles only cause a small portion of gun homicides, regardless of their design. Hand guns cause the majority of gun homicides / suicides, but the media focuses more on high profile "mass shootings".
Gun rights should not be infringed because of criminals and the mentally ill.