This kit represents a field modification of an SdKfz 10 Halftrack to mount the 3.7cm PaK 35/36 in the bed. The AT gun basically just had the wheels removed and was placed in a specially designed cradle in the bed of the halftrack. The sprues are from the halftrack kit (new) and the 3.7cm PaK kit (old), along with the special sprue for the mounting of the gun. There are Magic Tracks for the tracks and, if you are careful, they will moveable and will allow for a good representation of the track sag. There is one sprue of clear plastic and one small fret of photo etched parts.
Step 1. This step builds the drive sprocket, idler wheel, and the two front wheels. It has been noted elsewhere that the drive sprocket is undersize in both the diameter and the thickness. After I built a run of the track I found that the drive rollers are too wide and, to get the tracks to fit, I had to sand off a little of the drive rollers on both sides.