172 US M4A1 Half Track The M4A1 was a halftrack used by the US Army during WWII designed for use as a self-propelled mortar It carried an 81mm mortar in the rear of the vehicle along with up to 112 rounds of ammunition Model features detailed mortar compartment with 81mm mortar 30 cal machine gun & seats; separate road wheels & suspension arms; detailed cab with fold-down windshield steering wheel & driver figure; 1-piece moulded flexible vinyl tracks Skill Level 3 63 pieces Length 35 in (88 mm) Width 13 in (34 mm) Age 14 Plastic Model kit which requires paint & glue to complete