Brno Model 21/22 Barrel profile

Hello Folks

I'm playing round with various dimensions for a build, and one barrel profile I'd like to get a feel for is the Brno model 21 or 22 in 24" length. There were a few variations in these but mostly (I think) they had a parallel section over the reinforce, then a pretty straight taper to the muzzle. I have a 21 here but mine has a German "Kettner" barrel on it - completely different!.

If you could give me the approximate length of the reinforce, the diameter of it, the barrel diameter in front of the reinforce and at the muzzle that would be great. Via private message if you like.

Thanks
Foster

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