WHAT DOES RUGER P89 FOR SALE MEAN?

For sale is usually a Federal Arms Company of The united states 9mm threaded P89 barrel. I bought this a few years ago and installed it but I don't Feel I at any time set just one round by means of it.Not undesirable, but looking at just how much manufacturing facility mags are heading for right now, I'd personally likely use Mec-Gar. They Price ta