Okay I will post a link to a video tutorial on how to make the revolver cylinder using booleans.

I have the capture done I am just editing it and adding a sound track.

In this version I start with a 12-sided cylinder for the main cylinder and 6-sided cylinders for the holes and the indents. Why 12 and 6? Well I find a 6 sided polygon is about the smallest number of sides you can use to make a round cylinder when smoothed. Keeping the number of edges as low as possible will reduce the amount of cleanup we will need to do.

I chose 12-sided for the main cylinder because there are 6 holes and 6 indents so by choosing 12-sides I have either a hole or an indent at each of the cylinders 12 corners.

When smoothed everything will be nice and round.

Here is a screen shot of the new version and the original version...



Here is the .ma file with both versions...

I will have a link to the video tutorial shortly.

Cheers