Your basic anti-infantry halftrack with simbolic armor and low damage. While the 251 does have decent damage up close, you will rarely get it to be useful against armor at any point. But it's main cannon has a really fast reload, chewing up infantry lines like butter. If you experience any trouble with enemy infantry, the 251 will definatly help you out untill medium ranged anti armor units show up.
Fast reload, low cost
Slow, light armor, very light weapon