I asked this question at a family gathering to mostly non-shooters and the replys were as follows

Kentucky Long Rifle
Colt "six-shooter" I presume 1873 models
Winchester Lever, all models
".45 Colt Auto" 1911 model
"Tommygun" 1927 drum magazine model
Pump Action shotgun but they did not know make or model
M16
Remember these were responses from Australian non-shooters

Steve