The Chinese invented gun powder, so, it's not to far of a stretch to think they had some type of "shotgun".
Shotgun Red was created in 1983.
Shotgun Justice was created in 1990.
The Shotgun Boogie was created in 1950.
Shotgun - novel - was created in 1969.
Ridin' Shotgun was created in 1981.
Shotgun Angel was created in 1977.
Shotgun Express was created in 1966.
Shotgun - comics - was created in 1989.
Shotgun Messiah was created in 1985.
Shotgun Willie was created in 1973-06.
Shotgun reality was created in 2007-10.
Atchisson Assault Shotgun was created in 1972.