3d printed kit only no wagon 
can fit BACHMANN or mainline gwr bogie well wagon
barrel should go up and down
you are buying an non built and non painted 3d printed model kit 
allow 2 weeks to print 
will need to be sanded and filed and test fitting will be required for best results
 Bachman well wagon is not included model kit only 
The gun mount should have 360 degree of movement