This is an injection-plastic military vehicle model kit.
From the manufacturer:
The latest model to join the 1/35 scale Military Miniature Series is the M551 Sheridan, depicted in Vietnam War spec. Powerful yet lightweight form with 152mm gun/launcher is captured with aplomb. Can be assembled with hull front anti-RPG wire net and cupola gun shield. Comes with 2 full body figures and one torso, plus 2 marking options. 152mm gun/launcher showcases rifling detail. Assembly type tracks feature one-piece straight sections.