Expect it to bind at first for new users - ODIN Works Extended Magazine Release Gen II

I experienced binding when I set the tip of my finger in the concave portion of the magazine release. It appears the part was designed to provide a rest for the fat part of your finger pad while the tip presses in on the flat portion of the release. It works flawlessly with correct finger placement. To be honest, it appears I prefer just a concaved magazine release of standard size for around $8.00 as it doesn't matter what part of your finger presses it in.