Well, there's a lot of material right here in this forum. If they are computer users you can send the links that we've been posting send them in an email.
But, just for starters:
1. We had an AWB law with magazine restrictions, it made NO difference in crime rates. FBI and NIJ crime stats confirm this.
2. David Gregory, in his interview with Wayne LaPierre, showed just how easy it is to circumvent the law when he held up a 30 AR magazine for dramatic effect. His possession of this magazine is in violation of Washington DC law, where the show is taped. Bottom line, criminals, by definition, do not follow the law. Therefore, new laws will have no effect on them. Ditto the crazies: once they have decided to act, it may be a gun, or it may be another weapon, but they are not constrained in way, shape or form by law.
3. Since it has been amply, and sadly I might add, demonstrated that criminals and crazies can get their hands on weapons with no regard for the laws we already have, why should I be prohibited from defending myself with tools that give me some semblance of parity with the bad guys? I am a law abiding citizen, and my right of self defense should be equal to whatever the criminals have.
4. Look at all the proponents of restrictions in the media and politics. Chances are good that they are constantly escorted by armed security. Obviously they think that their lives are worth protecting, and firearms in the hands of trained individuals is how they do that. Is my life somehow worth less than theirs? Do you really feel that someone who would prohibit you from doing something that they feel they require for themselves can be trusted?
5. How many law abiding citizens will be transformed into criminal offenders if these new proposals are enacted? I don't want to become a criminal, and be at risk of losing everything I have worked for all of my life, because a law that is in clear violation of my rights has be put in place.
And finally, I saw this quote from Ayn Rand, which I thought was pretty good:
"Individual rights are not subject to a public vote; a majority has no right to vote away the rights of a minority; the political function of rights is precisely to protect minorities from oppression by majorities (and the smallest minority on earth is the individual)."
Good Luck, and my wishes for Happy Holidays in these trying times.