SpudFiles

Technician1002 wrote:Normal way to do this is to lay up a fiberglass or carbon fiber tube on a mandrel. Resin alone will be too weak.

You can mitigate the strength issue with a strong sleeve.

One other technique I've used that helps reduce wear is to bind the mandrel tightly with wire, it adds a lot of metal contact area and adds strength.

Again I must stress that this is a last resort, where possible tubing should be purchased commercially.

i want this for my barrel

No, you want this

but i need it air tight for my magazine

A diagram of how you intend to put it together would be helpful...

oh and how do you upload pictures to spudfiles like you jsr?

http://www.spudfiles.com/forums/posting ... 13190.html

You can still incorporate the brass barrel into this design.

Here's the mould I made to cast a similar design: