The Crusader AA anti-aircraft tank mounted twin 20mm Oerlikon anti-aircraft guns on a fast, light tank chassis. Armoured regiments had a troop of six Crusader AA tanks, usually distributed as a pair to each squadron.
One sprue to build an British Crusader AA tank. Made by Battlefront/GF9 for Flames of War but of course useable in any 15mm-1/100 scale game.
In hard plastic it will require assembly using plastic cement.
NEW
We have included a screen shot of the very simple assembly instructions in the photos.