So when dropped my pants today to do some business at the toilet I noticed a muzzle-sized abbrasion on the right inside of my leg. I knew why right away. I had switched barrels in my G17, going from the standard 4.5 inch bbl to a 5.5 inch ported bbl. The ported bbl stuck out just enough to rub through my pants and cause an abbrasion. No pain, just a bloody hole. I quickly put the std bbl back into my G17.