I am writing this with peaceful intentions. I thought I took the time to research, learn, and understand what everyone was talking about in regards to the stock Glock barrel chamber. Part of my confusion might be that I am not familiar with the older guns as I have a 3 generation G20 born at the beginning of 2012. I purchased a Lonewolf 6.6" 10mm barrel to shoot lead out of, and eventually make a long slide. In my opinion the feed ramps on my two barrels are almost the same. The Glock chamber is however larger in diameter than it needs to be. I understand this to be for reliable feeding in harsh/dirty conditions. I do not see it as being under supported. To me under supported would be the feed ramp going up into the chamber farther than it needs to be, and that being said any barrel that has a feed ramp cut into the chamber (all barrels by all manufacturers) could be considered under supported. My Glock barrel will bulge the brass from its larger chamber, but I don't understand all the talk about under supported glock barrels. Am I missing something? Thanks to all that contribute good peaceful info. Wanna kill these ads? We can help!