WHAT DOES BUY A GLOCK ONLINE MEAN?

I've a G22 that I bought for just a duty weapon about 11 several years in the past. I was going to purchase An additional Glock in .357 until finally I found out I could just do a barrel swap on my G22. Question is which model barrel and where to get it? I occasionally CC it but mostly just shoot it within the selection. Click to extend...Study pre