This is for the US M-114 designed to be a light weight recon scout for the armored units. Built by Cadillac with a Chevy 283 gas engine, amphibious and air deployable. Tight small troop compartment and inability to navigate rough terrain due to the narrow tracks ( BMP similar  ) and lack of protection against mines. Removed from combat in Vietnam but retained in all other commands until 1973 when retired. Last unit had them into 1979 before being replaced. Has 20 mm cannon or .50 cal