I have a design for a AR PISTON fix for carrier tilt and upper wear and so on, problem how do I get it made?
With out some one stealing my IDEA ???

Post pics and specs here and we'll make sure nobody steals your idea!

Hire a patent lawyer.

Have your fabricator sign an NDA.  If you're unsure what an NDA entails, hire an attorney specializing in IP law such as a patent attorney.

BTW, I have piston carrier fix too and I've made several.  Been testing one in my BM piston kit conversion and it works very well.  I too considered getting a patent for it, but really had to ask myself how big is the market and is it worth the patent filing fees, especially at the price I would be selling these things at.