A trailer on which the famous "meat grinder" - the Quad .50 Machine gun was mounted, shown with wheels and tow bar removed. In this configuration this trailer was the base for the Quad .50 when mounted on the gun trucks and also often in fixed emplacements. This 1:35 scale part lets you correct AFV Club's "Nancy" kit (
https://www.scalemates.com/kits/afv-club-af35034-m35a1--1137362), as out of th box it features an incorrect half-track-type base. This 3D printed base is also an improvement over AFV Clubs M548 kit resin parts (
https://www.scalemates.com/kits/afv-club-af35s32-m548-gun-cargo-truck--134224). In other words you need this part if you have a Quad .50 from Tamiya's M16 or from AFV Club and want to correctly show it emplaced in Vietnam.