This is my second Glock 19 barrel from tr-enabling (Remsport) My first Poly 80 build, the firearm shoots VERY accurately. I used it for my concealed carry qualification. I built a second Poly 80 G19 and used a Lone wolf barrel. It never would feed!! After some parts swapping I discovered my previous bbl & slide worked fine so I ordered another Remsport G19 bbl for the 2nd build. After slightly breaking in it is feeding much better. Still have to range test it.