She's concerned because she just doesn't get it.
Give her a dose of that Venus crap (empathy, feelings, etc.), then get down to bidness. Aight?
Explain to her that you have a set of safety rules you follow when handling and shooting firearms.
Let her know that if she could only find a way to become familiar [b]herself[/b], with these rules and the safe way to shoot, handle, and store these life saving (though dangerous)firearms, she would feel a lot more comfortable.
Encourage her to get a hunter safety class, or at least a firearm safety class. From someone besides you. Mind you, this is only to ease her mind, you're not trying to turn her into a bug-eyed AR convert. [;)]
She just needs to have this imbued in her as a way to validate that, yes, firearms need to be handled with care, and yes, they're as safe as the practices of the people around them.
After she's done that, let her know that the only way to really cement what she's learned, is to go to the range where you can show her how to see how what she's learned actually works in the AR's case.
A yellow chamber flag is a really good idea, IMHO.
And tell her about Suzanna Hupp, who left her protection only 100 feet away, but that was about 95 feet too far to save her father's life.
[url]http://abcnews.go.com/onair/WorldNewsTonight/wnt000505_21st_Hupp_feature.html[/url]