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"The Chimedon is essentially a heavier armed version of the Chimera that serves as a light tank. The Chimedon is armed with a turret-mounted Conqueror Cannon for added firepower. Some Chimedons were further upgraded with a Battle Cannon, but the stronger recoil of this weapon had the chance to seriously damage the vehicle itself upon firing the gun"
Warhammer 40k Wikia
The turret will losely fit older chimera, but has a ring adapter to fit current models. The top Hatch fits Rhino and Space marine hatches. DRY FIT BEFORE GLUEING TOGETHER.