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This is the same model as the earlier quad cannon, but this has been upscaled, basically doubled in size. The quad cannon is:
Width:11.47 mm wide.
Length, back of turret to tip of barrel: 18.506 mm
Height, from base to the cannon's highest elevation: 8.8 mm.
This is if you just need one quad cannon. If you need more than one, then its probably more economically feasible to order the upscaled quad cannon assembly of four. Sorry, frosted ultra detail only,