Whats the diameter of the barrel?

[K on the run]

I need the diameter of the .45 ACP Hand Ejector barrel from Raiders (the one with the chipped grip). I'm converting the Tanaka police special airsoft gun. I would prefer the messurment in cm. Inches will do as long as it isn't somthing like 9/16, please use decimals

Thanks,
Kim

[carebear]

1/8 = 0.125, 1/16 = 0.0625, 1/32 = 0.03125

In case it comes up.

[K on the run]

Thanks carebear

-Kim