Huh. She's holding a Model 1891 Moisin-Nagant turnbolt, a Russian rifle that shoots a big cartridge. No wussy AK ammo for her. Tuned up and practiced with regularly, d/o barrel condition, she can shoot your butt off at 500 yards no sweat. If the barrel's in great shape, look out, she's dangerous out to 1000 yards.
The point of the poster is valid and is true for all gun-control laws going back to the beginnings of colonial America. Gun laws were established to control, or more broadly to prevent, possession of firearms by black slaves and/or freedmen.
Touchy subject, 300 years ago.