One point shooting method, referred to as aimed point shooting, has been used and discussed since the early 19th century. The method employs the use of the index finger along the side of the gun to aim the gun, and the middle finger is used to pull the trigger. Mention of the use of the middle finger can be found in books from the early 1800s up through the 20th century: 1804, 1810, 1816, 1829 1835, 1885, 1898, 1900, 1908, 1912, and in many other military manuals on the M1911.