Although dragoons are normally only depicted with muskets they could also be armed with pikes (see the link in the original post). To represent this figure is portrayed as a pikeman using the ubiquitous plastic firelock figure from Warlord.
The arms were taken from a Perry plastics set (WoTR I think). Gaps in the shoulders were filled in with greenstuff. Using the same material the sleeve cuffs were also added.
Looking at the figure in the state show above I kept on thinking that something didn't quite seem right. As the figure represents a pikeman I realised I had to extend the shaft. To do this I used a spare polearm.