Carcano Modello 1891
The rifle you'd expect from the nation that fought 12 battles on the same spot in a row only to lose them all, and then went on to lose mountaineers to frostbite two years in a row in summer. Just look at that smug grin. "Tehee, guess we lost to Ethiopians again!"
…ingame, she has a weird skill that buffs dolls in her column slightly, which will later feature in a few specialized formations that include Python and is sometimes used to buff M82 (or Kar98k, in one of the few times she was ever brought ought the dorm) or her sister, to the point she's been called "Python's Exclusive Equipment" and "Grape's Exclusive Equipment." There's a couple of other niche uses as well (M200), but mostly, she looks like she needs to be supervised outdoors.