M113 (Gavin) fitted with M5 Modular Crowd Control Munitions (MCCM). The MCCMs intentionally use the same bodies as Claymore mines for an intimidation factor. The MCCM works similarly to a Claymore, except with a much lower powered charge and rubber balls instead of metal.
The vehicle was meant for military prison control. If a prison riot was getting out of hand, the vehicle could roll up and let off a broadside.