nishikawa hiroyuki, misaka imouto, barrett firearms manufacturing, toaru kagaku no railgun, toaru majutsu no index, 00s, 1girl, anti-materiel rifle, barrett m82, big gun, brown eyes, brown hair, dual wielding, female focus, fingerless gloves, gloves, gun, head-mounted display, holding, large weapon, loose socks, machine gun, mg42, rifle, school uniform, scope, short hair, skirt, sniper rifle, socks, solo, tokiwadai school uniform, weapon