Like many others here, I bought my wife her own AR with what I thought she needed such as an MRDS, X300 etc...she shoots it well but, well she prefers to the exclusion of everything, wait for it, a KelTec Sub2000.
I originally bought it to throw in my old 4Runner, there was a compartment that it fit in exactly, after some really positive comments on this board way back when, think 10 plus years ago maybe.
We took the little rifle out and did a little fam fire at the range with it and, well, it never made it to the truck. In fact it got as far as her closet where it resides up to this very minute.
Takes the same mags as her Glock (prior duty weapon) and she can reliably make head shots on demand at 40-50 yards. Its light, handy, mag compatible and well, most importantly she likes it and can shoot it well (plus it folds into a laptop case so it can go pretty much anywhere). A lot to be said for the 'likes it' category, meaning, she trains with it and trusts it.
I know it is a KelTec but it has worked fine for 10-12 years and frankly, since I depended on an MP5 for years for clearing houses-and still like it to be honest- I can't fault the 9mm inside its operational envelope.
The KelTec, now equipped with an X400, sling and some 33 round mags, makes her a force to be reckoned with inside 50 yards which, as a retired LEO, is a much longer range than she is normally faced with day to day where the rifle, or any long gun, would be available to her.
I should have learned a long time ago that I would have been better off not trying to force feed her what I like or what I think is best but I didn't and, while there is a really nice AR inside the safe that is little used, all that did was put a spare AR in the safe not put a rifle / carbine in my wife's hands if she was to ever need it . My advice,work with her and find what she likes, handles well and makes the best sense overall-from her perspective.
Much like handguns, where the .380 on her person beats the 9mm/.40/.45 in the safe, an M1 Carbine, PC9 or even a KelTec that she will shoot is a much better option than the AR she won't.
Just my thoughts......