The FN Browning Trombone is a pump-action long takedown rifle designed by John M. Browning in 1919, patented on 1 August 1922 and manufactured by Fabrique Nationale d'Herstal Belgium from 1922 to 1974. Models manufactured post 1969 had a product code W. The rifle has a .22 caliber chamber, a tubular 11-round magazine, 24-inch round barrel, wooden semi-pistol grip stock. Models made in the late 1960s featured a dovetail notch for mounting scopes.