Colt introduced a single action cal.22 identical to the model 1873 line but smaller in size. It was called the “Frontier Scout”. The shape of the grips, the fixed or adjustable sights are identical to the Single Action 1873 Cattleman. Calibres .22LR and .22Mag have interchangeable cylinders. The model Lightning is made only in .38Sp, 38LC. and 41 Colt.