I'm gonna make a suggestion contrary to what you asked, but I'm gonna explain it.
Wait until you can afford a quality red dot that has battery life in the tens of thousands of hours, or is dual illuminated. Spend the money now on a good light and let her get used to the mechanics of the light and the existing sights.
The reason I say this is you don't want her to have to 1) retrieve gun, 2) chamber round, 3) turn on electronic sight (or find it with dead batteries) and 4)then fumble with lights on top of all that. Wait until you can afford a sight that's always on, for years at a time.... then it's just pick up gun, rack it and run it.
Just my opinion which is worth the cost of admission to this post
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