Shown above are some Ral Partha conversions. Unfortunately Tom Meier never got around to sculpting artillery for this line of figures so I have been forced to improvise. The artillery piece below is an absolutely magnificent piece from the Ottoman section of The Assault Group's renaissance line. I agreed to paint this for them in return for the casting so a very generous offer from TAG indeed. I have put on a base coat and will work on making the barrel a nice metallic brass soon. The carriage will be unpainted wood, with the possibility of painted red wheels.
The TAG artillery comes with a great selection of accouterments as well. The powder barrel is particularly nice and corresponds very closely with descriptions I have read. The gun barrel itself is 50mm long, so a very large gun. In the true 25mm size of the figures, that translates into an 11-12 foot long barrel. This is actually well within the size range of renaissance pieces and makes it appropriate for a large culverin.
I am also working on some artillery for my 54mm British AWI. This is a very nice plastic set from Imex, which includes a well designed howitzer. I have replaced some of the fiddly bendy parts with metal and added some green stuff to make the muskets more accurate for British infantry (This was actually marketed as a colonial set, but the uniforms are the same).