Thanks for the response. I had assumed mine were plastic until I took them off the other day. Looks like they are metal. Think I'll just try them first and see just how hot they get before I make a decision about replacing them. I'm not the kind of guy that does "mag dumps". I seldom fire more than five shots at a time and will usually let my rifle cool off before firing the next five rounds. The metal ones might suit me just fine.

Thanks.