Shot 100 rounds on Saturday and the slide locked back only 3 out of the 15 mag reloads. Emailed Coonan again and also told them the slide was releasing on its own when inserting a loaded mag. Lastly, I noticed some burrs in the notch where the slide stop lever sits in. They replied this morning that they're sending me a return label to ship it back to them to fix the issue. Hopefully this can be fixed easily.