How to make an AR-15 rifle barrel

jay_williams

An AR-15 rifle barrel has varying diameters along its length. It also has a taper from the chamber near one end down to a smaller diameter a few inches away from that end. If you aren't familiar with this, just google "AR-15 rifle barrel" and you'll find some pictures to see what I'm describing.

I've created a single tube, of 1" diameter with a .223" bore. That was pretty easy. How do I specify the diameters of specific sections of the tube? Also, how do I create the taper near the chamber end of the barrel? I would like to be able to play with these diameters and the lengths of these diameters. Is that easy to do, or once I create a specific section of certain diameter, am I stuck with it? I tried this with SketchUp and there was virtually no flexibility to change lengths of varying diameters.

Thanks,
Jay

coleman

Check out the tutorials on the revolve feature.  

jay_williams

coleman said:

Check out the tutorials on the revolve feature.  

Will do. Thanks.

philip_thomas

Some of the techniques to demonstrate variable diameter helices and sweeps can be found in this public document:-

https://cad.onshape.com/documents/a0acd75a9d0d4a1a751f642f/w/1dd2693a236bb7d21dda7908/e/ede20c1d949b257f72bc4b7b

jay_williams

philip_thomas said:

Some of the techniques to demonstrate variable diameter helices and sweeps can be found in this public document:-

Great! Thanks!