54K views · 193 reactions | Using an M4 rifle, a 27-year-old #gunman opened fire in a #Manhattan building. #shooting | Business Insider | Facebook

37K views · 1.5K reactions | When loading the firearm on a M4 platform rifle always use the support hand to cycle the charging handle, never remove the shooting hand to charge it... | Snooky Cruz | Facebook

70K views · 636 reactions | A 27-year-old man wearing body armor and carrying an M4 assault rifle shot and killed four people, including an off-duty police officer working security in a Midtown Manhattan office building in a shooting rampage, officials said during a press conference Monday evening. A fifth victim was left critically injured in the shooting, officials said. The incident occurred just before 6:30 p.m. in a building located at 345 Park Ave. | ABC7NY | Facebook