2girls, 404_(girls'_frontline), assault_rifle, beret, closed_eyes, g11_(girls'_frontline), girls'_frontline, grey_background, greyscale, gun, h&k_g11, h&k_hk416, hair_ornament, hat, hk416_(girls'_frontline), holding, holding_gun, holding_weapon, jacket, long_hair, looking_back, monochrome, multiple_girls, nakiusagi, open_mouth, pleated_skirt, rifle, simple_background, sketch, skirt, sleeping, smile, surprised, trigger_discipline, weapon