they are not match barrels per say, and you can order them with or without fully supported chamber, so know before you buy..... they will be more accurate then factory barrels BUT frankly if you can outshoot the inherent accuracy of a factory barrel in a stock gun you should be on the olympic team. there are so many other factors besides the barrel to take into consideration.
spotique in quebec has he igb barrels in stock, looked at them last night but wanted SS so ordered a stormlake barrel from questar.... i would buy the barrel from nestor and seriously thought of changing my plan, but the barrel i want is going in SS lonewolf slide, otherwise i would have jumped on it.
again, i have a glock 17 lonewolf slide, so am looking for the exact same as you.... i even thought about buying nestors and having it gold nitrated but not sure how it would work on tenifer finish.