This is a heavy assault Speeder for the clone infantry, it was used extensively against the droid armies during landing assaults. it is equiped with a med level force field and has two side mounted heavy lasers.
Nice job. My group, Lightning Industries, is having a speeder hotrod contest (also a hotrod starfighter one as well) You should enter this. If you want, http://www.mocpages.com/group_conversation.php?id=56&topicid=37401 post a link to the entry here. There is also other contests and if you look at the beginning of the topic there is a list.