The Gundam launches with a beam rifle but in the next clip has a bazooka, and then ends up having a beam rifle for all the later clips. This occurs 19 minutes into the episode near the end.
At the 21 minute mark Doan's Zaku had its right shield shot of but in the scene where the enemy zaku is falling off the cliff you can tell that Doan's zaku has a shield. It appear that all the damage the suit had taken disappeared.